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The General Conference on Weights and Measures (GCWM; french: Conférence Générale des Poids et Mesures, CGPM) is the supreme authority of the
International Bureau of Weights and Measures The International Bureau of Weights and Measures (french: Bureau international des poids et mesures, BIPM) is an intergovernmental organisation An intergovernmental organization (IGO) is an organization composed primarily of sovereign state ...
(BIPM), the
intergovernmental organization An intergovernmental organization (IGO) is an organization composed primarily of sovereign states (referred to as ''member states''), or of other organizations through formal treaties for handling/serving common interests and governed by interna ...
established in 1875 under the terms of the
Metre Convention The Metre Convention (french: link=no, Convention du Mètre), also known as the Treaty of the Metre, is an international treaty A treaty is a formal, legally binding written agreement between actors in international law International ...

Metre Convention
through which member states act together on matters related to
measurement science
measurement science
and measurement standards. The CGPM is made up of delegates of the governments of the member states and observers from the Associates of the CGPM. Under its authority, the International Committee for Weights and Measures (ICWM; ) executes an exclusive direction and supervision of the BIPM. Initially the Metre Convention was only concerned with the
kilogram The kilogram (also kilogramme) is the base unit of mass Mass is the physical quantity, quantity of ''matter'' in a physical body. It is also a measure (mathematics), measure of the body's ''inertia'', the resistance to acceleration (change ...
and the
metre The metre ( Commonwealth spelling) or meter (American spelling Despite the various English dialects spoken from country to country and within different regions of the same country, there are only slight regional variations in English o ...
, but in 1921 the scope of the treaty was extended to accommodate all physical measurements and hence all aspects of the
metric system The metric system is a that succeeded the decimalised system based on the introduced in France in the 1790s. The historical development of these systems culminated in the definition of the (SI), under the oversight of an international stan ...

metric system
. In 1960 the 11th CGPM approved the
International System of Units The International System of Units, known by the international abbreviation SI in all languages and sometimes Pleonasm#Acronyms_and_initialisms, pleonastically as the SI system, is the modern form of the metric system and the world's most wi ...
, usually known as "SI". The General Conference receives the report of the CIPM on work accomplished; it discusses and examines the arrangements required to ensure the propagation and improvement of the International System of Units (SI); it endorses the results of new fundamental metrological determinations and various scientific resolutions of international scope; and it decides all major issues concerning the organization and development of the BIPM, including its financial endowment. The CGPM meets in Paris, usually once every four years. The 25th meeting of the CGPM took place from 18 to 20 November 2014, and the 26th meeting of the CGPM took place in Versailles from 13 to 16 November 2018.


Establishment

On 20 May 1875 an international treaty known as the ''Convention du Mètre'' (
Metre Convention The Metre Convention (french: link=no, Convention du Mètre), also known as the Treaty of the Metre, is an international treaty A treaty is a formal, legally binding written agreement between actors in international law International ...

Metre Convention
) was signed by 17 states. This treaty established an international organisation, the
Bureau international des poids et mesures The International Bureau of Weights and Measures (french: Bureau international des poids et mesures, BIPM) is an intergovernmental organisation An intergovernmental organization (IGO) is an organization composed primarily of sovereign states ...
(BIPM), consisting of: *Conférence générale des poids et mesures (CGPM), an intergovernmental conference of official delegates of member nations and the supreme authority for all actions; *Comité international des poids et mesures (CIPM), consisting of selected scientists and
metrologist 290px, alt=Man in white standing in front of a large machine, A scientist stands in front of the Microarcsecond Metrology (MAM) testbed. Metrology is the scientific study of measurement ' Measurement is the number, numerical quantification (sc ...
s, which prepares and executes the decisions of the CGPM and is responsible for the supervision of the International Bureau of Weights and Measures; *a permanent laboratory and secretariat function, the activities of which include the establishment of the basic standards and scales of the principal physical quantities and maintenance of the international prototype standards. The CGPM acts on behalf of the governments of its members. In so doing, it appoints members to the CIPM, receives reports from the CIPM which it passes on to the governments and national laboratories on member states, examines and where appropriate approves proposals from the CIPM in respect of changes to the International System of Units (SI), approves the budget for the BIPM (over €13 million in 2018) and it decides all major issues concerning the organization and development of the BIPM. The structure is analogous to that of a
stock corporation A joint-stock company is a business entity in which shares of the company's stock Stock (also capital stock) is all of the shares into which ownership of a corporation A corporation is an organization—usually a group of people ...
. The BIPM is the organisation, the CGPM is the
general meeting A general assembly or general meeting is a meeting of all the members of an organization An organization, or organisation ( Commonwealth English; see spelling differences), is an entity – such as a company, an institution, or an assoc ...

general meeting
of the shareholders, the CIPM is the
board of directors A board of directors is a group of people who jointly supervise the activities of an organization An organization, or organisation (Commonwealth English The use of the English language English is a West Germanic languages, W ...
appointed by the CGPM, and the staff at the site in Saint-Cloud perform the day-to-day work.


Membership criteria

The CGPM recognises two classes of membership – full membership for those states that wish to participate in the activities of the BIPM and associate membership for those countries or economiesAs of 2012, the only "economy" that was an associate member was CARICOM (Caribbean Community) – its membership comprising
Antigua and Barbuda Antigua and Barbuda (; ) is a sovereign Sovereign is a title which can be applied to the highest leader in various categories. The word is borrowed from Old French ''souverain'', which is ultimately derived from the Latin Latin (, or ...
,
Saint Kitts and Nevis Saint Kitts and Nevis (), officially the Federation of Saint Christopher and Nevis, is an island country in the West Indies. Located in the Leeward Islands chain of the Lesser Antilles, it is the smallest sovereign state in the Western Hemis ...
,
Barbados Barbados is an in the of the , in the region of , and the most easterly of the Caribbean Islands. It is in length and up to in width, covering an area of . It is in the western part of the North Atlantic, east of the and the . Barbad ...

Barbados
,
Saint Lucia Saint Lucia (, ; french: Sainte-Lucie) is an island country An island country or an island nation is a country A country is a distinct territory, territorial body or political entity. It is often referred to as the land of an individu ...

Saint Lucia
,
Belize Belize () is a Caribbean The Caribbean (, ; es, Caribe; french: Caraïbes; ht, Karayib; also gcf, label=Antillean Creole, Kawayib; nl, Caraïben; Papiamento: ) is a region of the Americas that comprises the Caribbean Sea, its surroundi ...

Belize
,
Saint Vincent and the Grenadines Saint Vincent and the Grenadines (), often Pars pro toto#Geography, simply referred to as Saint Vincent, is an island country in the Caribbean. It is located in the southeast Windward Islands of the Lesser Antilles, which lie in the West Ind ...

Saint Vincent and the Grenadines
,
Dominica Dominica ( or ; Kalinago : ; french: Dominique; Dominican Creole French Dominican Creole French is a French-based creole, which is the generally spoken language in Dominica Dominica ( or ; Kalinago language: ; french: Dominique; Do ...

Dominica
,
Suriname Suriname (, sometimes spelled Surinam), officially known as the Republic of Suriname ( nl, Republiek Suriname ), is a country on the northeastern Atlantic coast of South America. Borders of Suriname, It is bordered by the Atlantic Ocean to the ...

Suriname
,
Grenada Grenada ( ; Grenadian Creole French: ) is an island country in the West Indies in the Caribbean Sea at the southern end of the Grenadines island chain. Grenada consists of the island of Grenada itself, two smaller islands, Carriacou and Peti ...

Grenada
,
Trinidad and Tobago Trinidad and Tobago (, ), officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean The Caribbean (, ; es, Caribe; french: Caraïbes; ht, Karayib; also gcf, label=Antillean Creole Antillean C ...

Trinidad and Tobago
and
Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America South America is a entirely in the and mostly in the , with a relatively small portion in the . It can also be ...

Guyana
.
Jamaica Jamaica (; ) is an island country situated in the Caribbean Sea. Spanning in area, it is the third-largest island of the Greater Antilles and the Caribbean (after Cuba and Hispaniola). Jamaica lies about south of Cuba, and west of Hispanio ...

Jamaica
, although also a member of CARICOM, is an associate of the CGPM in its own right.
that only wish to participate in the CIPM MRA program. Associate members have observer status at the CGPM. Since all formal liaison between the convention organisations and national governments is handled by the member state's ambassador to France,In the case of France, the French Foreign Minister it is implicit that member states must have diplomatic relations with France, though during both world wars, nations that were at war with France retained their membership of the CGPM. CGPM meetings are chaired by the Président de l'Académie des Sciences de Paris. Of the twenty countries that attended the Conference of the Metre in 1875, representatives of seventeen signed the convention on 20 May 1875.
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country located mostly in the southern half of South America. Sharing the bulk of the Southern Cone with Chile to the west, the country is also bordered ...

Argentina
,
Austria-Hungary Austria-Hungary, often referred to as the Austro-Hungarian Empire or the Dual Monarchy, was a constitutional monarchy A constitutional monarchy, parliamentary monarchy, or democratic monarchy is a form of monarchy in which the monarch exe ...

Austria-Hungary
,
Belgium Belgium ( nl, België ; french: Belgique ; german: Belgien ), officially the Kingdom of Belgium, is a country in Western Europe Western Europe is the western region of Europe. The region's countries and territories vary depending on cont ...

Belgium
,
Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At 8.5 million square kilometers (3.2 million square miles) and with over 211 mill ...
, Denmark,
France France (), officially the French Republic (french: link=no, République française), is a List of transcontinental countries, transcontinental country spanning Western Europe and Overseas France, overseas regions and territories in the Ame ...
,
German Empire The German Empire or the Imperial State of Germany,, officially '.Herbert Tuttle Herbert Tuttle (1846–1894) was an American historian. Biography Herbert Tuttle was born in Bennington, Vermont Bennington is a New England town, town ...
,
Italy Italy ( it, Italia ), officially the Italian Republic ( it, Repubblica Italiana, links=no ), is a country consisting of Italian Peninsula, a peninsula delimited by the Alps and List of islands of Italy, several islands surrounding it, whose ...
,
Peru , , image_flag = Flag_of_Peru.svg , image_coat = Escudo_nacional_del_Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = National seal , national_motto ...

Peru
,
Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country A country is a distinct territorial body or political entity A polity is an identifiable political entity—any group of people who ...
,
Russia Russia ( rus, link=no, Россия, Rossiya, ), or the Russian Federation, is a country spanning Eastern Europe Eastern Europe is the eastern region of . There is no consistent definition of the precise area it covers, partly because th ...
,
Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = , national_anthem = , image_map = , map_caption = , image_map2 ...
,
Sweden and Norway Sweden and Norway or Sweden–Norway ( sv, Svensk-norska unionen; no, Den svensk-norske union(en)), officially the United Kingdoms of Sweden and Norway, or as the United Kingdoms, was a personal union A personal union is the combination of t ...
,
Switzerland , french: Suisse(sse), it, svizzero/svizzera or , rm, Svizzer/Svizra , government_type = Federalism, Federal semi-direct democracy under an assembly-independent Directorial system, directorial republic , leader_title1 = Fe ...

Switzerland
,
Ottoman Empire The Ottoman Empire (; ', ; or '; )info page on bookat Martin Luther University) // CITED: p. 36 (PDF p. 38/338). was an empire that controlled much of Southeastern Europe, Western Asia, and North Africa, Northern Africa between the 14th ...
, United States and
Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continent A continent is any of several large l ...

Venezuela
.
In April 1884 HJ Chaney, Warden of Standards in London unofficially contacted the BIPM inquiring whether the BIPM would calibrate some metre standards that had been manufactured in the United Kingdom.
Broch A broch () is an Iron Age The Iron Age is the final epoch of the three-age system, three-age division of the prehistory and protohistory of Homo sapiens, humanity. It was preceded by the Stone Age (Paleolithic, Mesolithic, Neolithic, and Ch ...

Broch
, director of the BIPM replied that he was not authorised to perform any such calibrations for non-member states. On 17 September 1884, the British Government signed the convention on behalf of the United Kingdom. This number grew to 21 in 1900, 32 in 1950, and 49 in 2001. , there are 63 Member States and 40 Associate States and Economies of the General Conference (with year of partnership in parentheses):


Member States

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country located mostly in the southern half of South America. Sharing the bulk of the Southern Cone with Chile to the west, the country is also bordered ...

Argentina
(1877)
Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

Australia
(1947)
Austria Austria (, ; german: Österreich ), officially the Republic of Austria (german: Republik Österreich, links=no, ), is a landlocked Eastern Alps, East Alpine country in the southern part of Central Europe. It is composed of nine States o ...

Austria
(1875)Joined originally as
Austria-Hungary Austria-Hungary, often referred to as the Austro-Hungarian Empire or the Dual Monarchy, was a constitutional monarchy A constitutional monarchy, parliamentary monarchy, or democratic monarchy is a form of monarchy in which the monarch exe ...

Austria-Hungary

Belarus , image_map = , map_caption = , capital = Minsk Minsk ( be, Мінск , russian: link=no, Минск) is the capital and the largest city of Belarus, located on the Svislach (Berezina), Svislach and the now subterranean Nyamiha, Niam ...

Belarus

Belgium Belgium ( nl, België ; french: Belgique ; german: Belgien ), officially the Kingdom of Belgium, is a country in Western Europe Western Europe is the western region of Europe. The region's countries and territories vary depending on cont ...

Belgium
(1875)
Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At 8.5 million square kilometers (3.2 million square miles) and with over 211 mill ...

Brazil
(1921)
Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria ( bg, Република България, links=no, Republika Bǎlgariya, ), is a country in Southeast Europe. It is bordered by Romania to the north, Serbia ...

Bulgaria
(1911)
Canada Canada is a country in the northern part of North America North America is a continent A continent is any of several large landmasses. Generally identified by convention (norm), convention rather than any strict criteria, ...

Canada
(1907)
Chile Chile, officially the Republic of Chile, is a country in the western part of South America South America is a entirely in the and mostly in the , with a relatively small portion in the . It can also be described as the southern ...

Chile
(1908)
China China (), officially the People's Republic of China (PRC; ), is a country in East Asia East Asia is the eastern region of Asia Asia () is Earth's largest and most populous continent, located primarily in the Eastern Hemisphere ...

China
(1977)
Colombia Colombia ( , ; ), officially the Republic of Colombia, is a transcontinental country This is a list of countries located on more than one continent A continent is one of several large landmasses. Generally identified by conv ...

Colombia
(2012)
Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = "Lijepa naša domovino ''Lijepa naša domovino'' (; ) is the national anthem A national anthem is a song that ...

Croatia
(2008)
Czech Republic The Czech Republic, also known by its short-form name Czechia and formerly known as Bohemia, is a landlocked country in Central Europe. It is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to ...
(1922)Joined originally as part of
Czechoslovakia , , yi, טשעכאסלאוואקיי, , common_name = Czechoslovakia , life_span = 1918–19391945–1992 , p1 = Austria-Hungary , image_p1 = , s1 = Czech Re ...

Czechoslovakia

Denmark Denmark ( da, Danmark, ) is a Nordic country The Nordic countries, or the Nordics, are a geographical and cultural region In geography, regions are areas that are broadly divided by physical characteristics ( physical geography), hu ...

Denmark
(1875)
Ecuador Ecuador ( ; ; Quechua Quechua may refer to: *Quechua people, several indigenous ethnic groups in South America, especially in Peru *Quechuan languages, a Native South American language family spoken primarily in the Andes, derived from a ...

Ecuador

Egypt Egypt ( ar, مِصر, Miṣr), officially the Arab Republic of Egypt, is a transcontinental country This is a list of countries located on more than one continent A continent is one of several large landmasses. Generally identi ...

Egypt
(1962)
Estonia Estonia ( et, Eesti ), officially the Republic of Estonia ( et, Eesti Vabariik, links=no), is a country in northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden ...

Estonia

Finland Finland ( fi, Suomi ; sv, Finland ), officially the Republic of Finland (; ), is a Nordic country in Northern Europe. It shares land borders with Sweden to the west, Russia to the east, Norway to the north, and is defined by the Gulf of B ...

Finland
(1913)
France France (), officially the French Republic (french: link=no, République française), is a transcontinental country This is a list of countries located on more than one continent A continent is one of several large landmasses ...

France
(1875)
Germany ) , image_map = , map_caption = , map_width = 250px , capital = Berlin Berlin (; ) is the Capital city, capital and List of cities in Germany by population, largest city of Germany by both area and population. Its 3,769,495 inh ...

Germany
(1875)
Greece Greece ( el, Ελλάδα, Elláda, ), officially the Hellenic Republic, is a country located in Southeastern Europe Southeast Europe or Southeastern Europe () is a geographical subregion A subregion is a part of a larger region In geogr ...

Greece
(2001)
Hungary Hungary ( hu, Magyarország ) is a in . Spanning of the , it is bordered by to the north, to the northeast, to the east and southeast, to the south, and to the southwest and to the west. Hungary has a population of 10 million, mostl ...

Hungary
(1925)Joined originally as
Austria-Hungary Austria-Hungary, often referred to as the Austro-Hungarian Empire or the Dual Monarchy, was a constitutional monarchy A constitutional monarchy, parliamentary monarchy, or democratic monarchy is a form of monarchy in which the monarch exe ...

Austria-Hungary

India India, officially the Republic of India (Hindi Hindi (Devanagari: , हिंदी, ISO 15919, ISO: ), or more precisely Modern Standard Hindi (Devanagari: , ISO 15919, ISO: ), is an Indo-Aryan language spoken chiefly in Hindi Belt, ...

India
(18 80 )
Indonesia Indonesia ( ), officially the Republic of Indonesia ( id, Republik Indonesia, links=yes ), is a country in Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia or SEA, is t ...

Indonesia
(1960)
Iran Iran ( fa, ایران ), also called Persia, and officially the Islamic Republic of Iran, is a country in Western Asia Western Asia, West Asia, or Southwest Asia, is the westernmost subregion A subregion is a part of a larger regio ...

Iran
(1975)
Iraq Iraq ( ar, الْعِرَاق, translit=al-ʿIrāq; ku, عێراق, translit=Êraq), officially the Republic of Iraq ( ar, جُمْهُورِيَّة ٱلْعِرَاق '; ku, کۆماری عێراق, translit=Komarî Êraq), is a country i ...

Iraq
(2013)
Ireland Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic. It is separated from Great Britain to its east by the North Channel (Great Britain and Ireland), North Channel, the Irish Sea ...

Ireland
(1925)
Israel Israel (; he, יִשְׂרָאֵל, translit=Yīsrāʾēl; ar, إِسْرَائِيل, translit=ʾIsrāʾīl), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a ...

Israel
(1985)
Italy Italy ( it, Italia ), officially the Italian Republic ( it, Repubblica Italiana, links=no ), is a country consisting of a peninsula delimited by the Alps The Alps ; german: Alpen ; it, Alpi ; rm, Alps; sl, Alpe ) are the highest ...

Italy
(1875)
Japan Japan ( ja, 日本, or , and formally ) is an island country An island country or an island nation is a country A country is a distinct territory, territorial body or political entity. It is often referred to as the land of an in ...

Japan
(1885)
Kazakhstan Kazakhstan ( kk, Қазақстан, Qazaqstan; russian: Казахстан, Kazakhstan), officially the Republic of Kazakhstan,; russian: Республика Казахстан, Respublika Kazakhstan, link=no) is a country located mainly in ...

Kazakhstan
(2008)
Kenya ) , national_anthem = "Ee Mungu Nguvu Yetu "Ee Mungu Nguvu Yetu" (, ) is the national anthem of Kenya. History "Ee Mungu Nguvu Yetu"'s lyrics were originally written in Swahili language, Kiswahili, the national language of Kenya ...

Kenya
(2010)
Lithuania Lithuania (; lt, Lietuva ), officially the Republic of Lithuania ( lt, Lietuvos Respublika, links=no), is a country in the Baltic region The terms Baltic Sea Region, Baltic Rim countries (or simply Baltic Rim), and the Baltic Sea countr ...
(2015)
Malaysia Malaysia ( ; ) is a country in Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia or SEA, is the geographical southeastern subregion of Asia, consisting of the regions ...

Malaysia
(2001)
Mexico Mexico, officially the United Mexican States, is a country A country is a distinct territorial body or political entity A polity is an identifiable political entity—any group of people who have a collective identity, who are organi ...

Mexico
(1890)
Montenegro Montenegro (; cnr, Crna Gora, , , ; sq, Mali i zi) is a country in Southeastern Europe Southeast Europe or Southeastern Europe () is a geographical subregion A subregion is a part of a larger region In geography Geography (fro ...

Montenegro
(2018)
Morocco ) , image_map = Morocco (orthographic projection, WS claimed).svg , map_caption = Location of Morocco in northwest Africa.Dark green: Undisputed territory of Morocco.Lighter green: Western Sahara, a United Nations lis ...

Morocco

Netherlands ) , national_anthem = ( en, "William of Nassau") , image_map = EU-Netherlands.svg , map_caption = , image_map2 = BES islands location map.svg , map_caption2 = , image_map3 ...

Netherlands
(1929)
New Zealand New Zealand ( mi, Aotearoa ''Aotearoa'' (; commonly pronounced by English English usually refers to: * English language English is a West Germanic languages, West Germanic language first spoken in History of Anglo-Saxon Engl ...

New Zealand
(1991)
Norway Norway, officially the Kingdom of Norway,Names in the official and recognised languages: Bokmål Bokmål (, ; literally "book tongue") is an official written standard for the Norwegian language Norwegian (Norwegian: ''norsk'') is a Nort ...

Norway
(1875)Joined originally as part of
Sweden and Norway Sweden and Norway or Sweden–Norway ( sv, Svensk-norska unionen; no, Den svensk-norske union(en)), officially the United Kingdoms of Sweden and Norway, or as the United Kingdoms, was a personal union A personal union is the combination of t ...

Pakistan Pakistan, . Pronounced variably in English as , , , and . officially the Islamic Republic of Pakistan, is a country in South Asia. It is the world's List of countries and dependencies by population, fifth-most populous country, with a popul ...

Pakistan
(1973)
Poland Poland, officially the Republic of Poland, is a country located in Central Europe. It is divided into 16 Voivodeships of Poland, administrative provinces, covering an area of , and has a largely Temperate climate, temperate seasonal cli ...

Poland
(1925)
Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country A country is a distinct territorial body or political entity A polity is an identifiable political entity—any group of people who ...

Portugal
(1876)
Romania Romania ( ; ro, România ) is a country at the crossroads of Central Central is an adjective usually referring to being in the center (disambiguation), center of some place or (mathematical) object. Central may also refer to: Directions ...

Romania
(1884)
Russian Federation Russia ( rus, link=no, Россия, Rossiya, ), or the Russian Federation, is a country spanning Eastern Europe and Northern Asia. It is the List of countries and dependencies by area, largest country in the world, covering over , and encom ...

Russian Federation
(1875)Joined originally as the
Russian Empire The Russian Empire, . commonly referred to as Imperial Russia, was a historical empire that extended across Eurasia and North America from 1721, succeeding the Tsardom of Russia following the Treaty of Nystad that ended the Great Northern War. ...

Saudi Arabia (''Shahada'') , national_anthem = "National Anthem of Saudi Arabia, " "National Anthem of Saudi Arabia" , image_map = Saudi Arabia (orthographic projection).svg , capital = Riyadh , coordinates ...

Saudi Arabia
(2011)
Serbia Serbia (, ; Serbian Serbian may refer to: * someone or something related to Serbia, a country in Southeastern Europe * someone or something related to the Serbs, a South Slavic people * in both meanings, depending on the context, it may ref ...

Serbia
(2001)
Singapore Singapore (), officially the Republic of Singapore, is a sovereign state, sovereign island city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, bor ...

Singapore
(1994)
Slovakia Slovakia (; sk, Slovensko ), officially the Slovak Republic ( sk, Slovenská republika, links=no ), is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to th ...

Slovakia
(1922)
Slovenia Slovenia ( ; sl, Slovenija ), officially the Republic of Slovenia (Slovene: , abbr.: ''RS''), is a country in Central Europe. It is bordered by Italy Italy ( it, Italia ), officially the Italian Republic ( it, Repubblica Italiana, l ...

Slovenia
(2016)
South Africa South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. With over 60 million people, it is the world's 23rd-most populous nation and covers an area of . South Africa has three capital citie ...

South Africa
(1964)
South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is for ...

South Korea
(1959)
Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = , national_anthem = , image_map = , map_caption = , image_map2 ...

Spain
(1875)
Sweden Sweden ( sv, Sverige ), officially the Kingdom of Sweden ( sv, links=no, Konungariket Sverige ), is a Nordic country The Nordic countries, or the Nordics, are a geographical and cultural region In geography, regions are areas that ...

Sweden
(1875)
Switzerland , french: Suisse(sse), it, svizzero/svizzera or , rm, Svizzer/Svizra , government_type = Federalism, Federal semi-direct democracy under an assembly-independent Directorial system, directorial republic , leader_title1 = Fe ...

Switzerland
(1875)
Thailand Thailand ( th, ประเทศไทย), historically known as Siam, () officially the Kingdom of Thailand, is a country in Southeast Asia. It is located at the centre of the Mainland Southeast Asia, Indochinese Peninsula, spanning , wi ...

Thailand
(1912)
Tunisia ) , image_map = Tunisia location (orthographic projection).svg , map_caption = Location of Tunisia in northern Africa Africa is the world's second-largest and second-most populous , after in both cases. At about 30.3 million km2 (11. ...

Tunisia
(2012)
Turkey Turkey ( tr, Türkiye ), officially the Republic of Turkey, is a country located mainly on Anatolia Anatolia,, tr, Anadolu Yarımadası), and the Anatolian plateau. also known as Asia Minor, is a large peninsula in Western Asia an ...

Turkey
(1875)Joined originally as the
Ottoman Empire The Ottoman Empire (; ', ; or '; )info page on bookat Martin Luther University) // CITED: p. 36 (PDF p. 38/338). was an empire that controlled much of Southeastern Europe, Western Asia, and North Africa, Northern Africa between the 14th ...

Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in . It is the in Europe after , which it borders to the east and north-east. Ukraine also shares borders with to the north; , , and to the west; and to the south; and has a coastli ...

Ukraine
(2018)
United Arab Emirates The United Arab Emirates (UAE; ar, الإمارات العربية المتحدة ) or the Emirates ( ar, الإمارات ), is a country in Western Asia Western Asia, West Asia, or Southwest Asia, is the westernmost subregion A subregio ...

United Arab Emirates
(2015)
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain,Usage is mixed. The Guardian' and Telegraph' use Britain as a synonym for the United Kingdom. Some prefer to use Britain as shorth ...

United Kingdom
(1884)
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country Continental United States, primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., ...

United States
(1878)
Uruguay Uruguay (; ; pt, Uruguai), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; whi ...

Uruguay
(1908)


=Notes

=


Associates

At the 21st meeting of the CGPM in October 1999, the category of "associate" was created for states not yet BIPM members and for
economic union An economic union is a type of trade bloc A trade bloc is a type of intergovernmental agreement, often part of a regional intergovernmental organization An intergovernmental organization (IGO) is an organization composed primarily of sovere ...
s.
Albania Albania ( ; sq, Shqipëri or Shqipëria), officially the Republic of Albania ( sq, Republika e Shqipërisë), is a country in Southeastern Europe Southeast Europe or Southeastern Europe () is a geographical subregion A subregion is a par ...

Albania
(2007)
Azerbaijan Azerbaijan (, ; az, Azərbaycan ), officially the Republic of Azerbaijan ( az, Azərbaycan Respublikası ), is a country in the Transcaucasia, Caucasus region of Eurasia. Located at the crossroads of Eastern Europe and Western Asia, it is boun ...

Azerbaijan
(2015)
Bangladesh Bangladesh (, bn, বাংলাদেশ, ), officially the People's Republic of Bangladesh, is a country in South Asia South Asia is the southern region of Asia, which is defined in both geography, geographical and culture, ethno-c ...

Bangladesh
(2010)
Bolivia Bolivia ; ay, Wuliwya ; Quechuan languages, Quechua: ''Puliwya'' , officially the Plurinational State of Bolivia, is a landlocked country located in western-central South America. The constitutional capital is Sucre, while the seat of g ...

Bolivia
(2008)
Bosnia and Herzegovina Bosnia and Herzegovina,, abbreviated BiH or B&H, sometimes called Bosnia–Herzegovina and often known informally as Bosnia, is a country in South South is one of the cardinal directions or compass points. South is the opposite of north a ...

Bosnia and Herzegovina
(2011)
Botswana Botswana (, also ), officially the Republic of Botswana ( tn, Lefatshe la Botswana, label=Setswana; Kalanga language, Kalanga: ''Hango yeBotswana''), is a landlocked country in Southern Africa. Botswana is topographically flat, with up to 70 ...

Botswana
(2012)
Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese peninsula in Southeast Asia. It is in area, bordered by Thailand to Cambodia–T ...

Cambodia

Caribbean Community The Caribbean Community (CARICOM or CC) is an organisation of fifteen states and dependencies throughout the Caribbean having primary objectives to promote economic integration and cooperation among its members, to ensure that the benefits of inte ...
(2005)
Chinese Taipei "Chinese Taipei" is the name used in some international organizations and competitions for Taiwan Taiwan (), officially the Republic of China (ROC), is a country in East Asia. Neighbouring countries include the China, People's Republic ...
(2002)
Costa Rica Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in Central America Central America ( es, América Central, , ''Centroamérica'' ) is a region of the Amer ...

Costa Rica
(2004)
Cuba Cuba ( , ), officially the Republic of Cuba ( es, República de Cuba, links=no ), is a country comprising the island of Cuba, as well as Isla de la Juventud Isla de la Juventud (; en, Isle of Youth) is the second-largest Cuban islan ...

Cuba
(2000)
Ethiopia Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a landlocked country A landlocked country is a country A country is a distinct territory, territorial body or political entity. It is often referred to as the ...

Ethiopia
(2018)
Georgia Georgia usually refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), one of the states of the United States of America Georgia may also refer to: Historical states and entities * Democratic Republ ...
(2008)
Ghana Ghana (), officially the Republic of Ghana, is a country in West Africa West Africa or Western Africa is the westernmost region of . The defines Western Africa as the 17 countries of , , , , , , , , , , , , , , , and as well as .Paul R. ...

Ghana
(2009)
Hong Kong Hong Kong (; , ), officially the Hong Kong Special Administrative Region of the People's Republic of China (HKSAR), is a city A city is a large human settlement.Goodall, B. (1987) ''The Penguin Dictionary of Human Geography''. London: Pe ...

Hong Kong
(2000)
Jamaica Jamaica (; ) is an island country situated in the Caribbean Sea. Spanning in area, it is the third-largest island of the Greater Antilles and the Caribbean (after Cuba and Hispaniola). Jamaica lies about south of Cuba, and west of Hispanio ...

Jamaica
(2003)
Kuwait Kuwait (; ar, الكويت ', or ), officially the State of Kuwait ( ar, دولة الكويت '), is a country in Western Asia Western Asia, West Asia, or Southwest Asia, is the westernmost subregion A subregion is a part of a larger regi ...

Kuwait
(2018)
Latvia Latvia ( or ; lv, Latvija ; ltg, Latveja; liv, Leţmō), officially known as the Republic of Latvia ( lv, Latvijas Republika, links=no, ltg, Latvejas Republika, links=no, liv, Leţmō Vabāmō, links=no), is a country in the Baltic re ...

Latvia
(2001)
Luxembourg Luxembourg ( ; lb, Lëtzebuerg ; french: link=no, Luxembourg; german: link=no, Luxemburg), officially the Grand Duchy of Luxembourg, ; french: link=no, Grand-Duché de Luxembourg ; german: link=no, Großherzogtum Luxemburg is a landlocked ...

Luxembourg
(2014)
Malta Malta ( , , ), officially known as the Republic of Malta ( mt, Repubblika ta' Malta ) and formerly Melita, is a Southern European island country consisting of an archipelago in the Mediterranean Sea. It lies south of Italy, east of Tunisi ...

Malta
(2001)
Mauritius Mauritius ( ; french: Maurice, link=no ; mfe, label=Mauritian Creole Mauritian Creole or Morisien or formerly Morisyen ( mfe, kreol morisien, links=no ) is a French-based creole language spoken in Mauritius Mauritius ( ; french: ...

Mauritius
(2010)
Moldova Moldova (, ; ), officially the Republic of Moldova ( ro, Republica Moldova), is a landlocked country A landlocked country is a country A country is a distinct territory, territorial body or political entity. It is often referred to ...

Moldova
(2007)
Mongolia Mongolia (, mn, Монгол Улс, Mongol Uls, Mongolian script, Traditional Mongolian: '; literal translation, lit. "Mongol Nation" or "State of Mongolia") is a landlocked country in East Asia. It is bordered by Russia Mongolia–Russia ...

Mongolia
(2013)
Namibia Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa Southern Africa is the south South is one of the cardinal directions or compass points. South is the opposite of north and is perpendicular to the east a ...

Namibia
(2012)
North Macedonia North Macedonia, ; sq, Maqedonia e Veriut, (Macedonia before February 2019), officially the Republic of North Macedonia,, is a country in Southeast Europe Southeast Europe or Southeastern Europe () is a geographical subregion A sub ...
(2006)
Oman Oman ( ; ar, عُمَان ' ), officially the Sultanate of Oman ( ar, سلْطنةُ عُمان ), is a country on the southeastern coast of the Arabian Peninsula in Western Asia. Formerly a maritime empire, Oman is the oldest continuously in ...

Oman
(2012)
Panama Panama ( , ; es, link=no, Panamá ), officially the Republic of Panama ( es, República de Panamá), is a transcontinental country This is a list of countries located on more than one continent A continent is one of several ...

Panama
(2003)
Paraguay Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tetã Paraguái, links=no), is a country in South America South America is a entirely in the and mostly in the , with a relatively sma ...

Paraguay
(2009)
Peru , , image_flag = Flag_of_Peru.svg , image_coat = Escudo_nacional_del_Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = National seal , national_motto ...

Peru
(2009)
Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

Philippines
(2002)
Qatar Qatar (, , or ; ar, قطر, Qaṭar ; local vernacular pronunciation: ), officially the State of Qatar,) is a country in Western Asia. It occupies the small Qatar Peninsula on the northeastern coast of the Arabian Peninsula, and shares it ...

Qatar
(2016)
Seychelles Seychelles (; ), officially the Republic of Seychelles (french: link=no, République des Seychelles; Creole: ''La Repiblik Sesel''), is an archipelagic island country An island country or an island nation is a country A country ...

Seychelles
(2010)
Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකාව, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon, and officially the Democratic Socialist Republic of Sri Lanka, is ...

Sri Lanka
(2007)
Sudan Sudan ( or ; ar, السودان, as-Sūdān), officially the Republic of the Sudan ( ar, جمهورية السودان, link=no, Jumhūriyyat as-Sūdān), is a country in Northeast Africa. It borders the countries of Central African Republ ...

Sudan
(2014)
Syria Syria ( ar, سُورِيَا or ar, سُورِيَة, ''Sūriyā''), officially the Syrian Arab Republic ( ar, ٱلْجُمْهُورِيَّةُ ٱلْعَرَبِيَّةُ ٱلسُّورِيَّةُ, al-Jumhūrīyah al-ʻArabīyah as-S ...

Syria
(2012)
Tanzania Tanzania (; ), officially the United Republic of Tanzania ( sw, Jamhuri ya Muungano wa Tanzania), is a country in East Africa East Africa or Eastern Africa is the eastern subregion of the Africa Africa is the world's second-larges ...

Tanzania
(2018)
Uzbekistan Uzbekistan (, ; uz, Ozbekiston, ), officially the Republic of Uzbekistan ( uz, Ozbekiston Respublikasi), is a landlocked country A country is a distinct territory, territorial body or political entity. It is often referred to as the land ...

Uzbekistan
(2018)
Vietnam Vietnam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,, group="n" is a country in Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia or SEA, is the ...

Vietnam
(2003)
Zambia Zambia (), officially the Republic of Zambia ( Bemba:'' Icalo ca Zambia''; Tonga Tonga (, ), officially named the Kingdom of Tonga ( to, Puleʻanga Fakatuʻi ʻo Tonga), is a Polynesia Polynesia (, ; from grc, πολύς "many" ...

Zambia
(2010)


CGPM meetings


International Committee for Weights and Measures

The International Committee for Weights and Measures consists of eighteen persons, each of a different nationality. elected by the General Conference on Weights and Measures (CGPM) whose principal task is to promote worldwide uniformity in
units of measurement A unit of measurement is a definite magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematic ...
by taking direct action or by submitting proposals to the CGPM. The CIPM meets every year (since 2011 in two sessions per year) at the
Pavillon de Breteuil The Pavillon de Breteuil is a building that is located in the southeastern section of the Parc de Saint-Cloud 250px, The location of the Chateau is marked by the yew trees The Parc de Saint-Cloud, officially the ''Domaine National de Saint-Cloud' ...
where, among other matters, it discusses reports presented to it by its Consultative Committees. Reports of the meetings of the CGPM, the CIPM, and all the Consultative Committees, are published by the BIPM.


Mission

The
secretariat Secretariat may refer to: * Secretariat (administrative office) The secretariat of an organization is the department that fulfils its central administrative or general secretary duties. The term is especially associated with government ...
is based in
Saint-Cloud Saint-Cloud () is a commune in the western suburbs of Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, most populous city of France, with an estimated population of 2,175,601 residents ...
,
Hauts-de-Seine Hauts-de-Seine (; ) is a Departments of France, department of France located in the Regions of France, region of Île-de-France. It is part of Grand Paris as it covers the western inner Banlieue, suburbs of Paris. With a population of 1,603,268 (a ...

Hauts-de-Seine
,
France France (), officially the French Republic (french: link=no, République française), is a transcontinental country This is a list of countries located on more than one continent A continent is one of several large landmasses ...

France
. In 1999 the CIPM has established the CIPM ''Arrangement de reconnaissance mutuelle'' (Mutual Recognition Arrangement, MRA) which serves as the framework for the mutual acceptance of national measurement standards and for recognition of the validity of calibration and measurement certificates issued by national metrology institutes. A recent focus area of the CIPM has been the revision of the SI.


Consultative committees

The CIPM has set up a number of consultative committees (CC) to assist it in its work. These committees are under the authority of the CIPM. The president of each committee, who is expected to take the chair at CC meetings, is usually a member of the CIPM. Apart from the CCU, membership of a CC is open to National Metrology Institutes ( NMIs) of Member States that are recognized internationally as most expert in the field. NMIs from Member States that are active in the field, but lack the expertise to become Members, are able to attend CC meetings as observers. These committees are: *CCAUV: Consultative Committee for
Acoustics Acoustics is a branch of physics Physics is the that studies , its , its and behavior through , and the related entities of and . "Physical science is that department of knowledge which relates to the order of nature, or, in other wo ...
,
Ultrasound Ultrasound is s with higher than the upper audible limit of human . Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is appro ...

Ultrasound
and
Vibration Vibration is a mechanical phenomenon whereby oscillation Oscillation is the repetitive variation, typically in time Time is the indefinite continued sequence, progress of existence and event (philosophy), events that occur in an apparentl ...

Vibration
*CCEM: Consultative Committee for
Electricity Electricity is the set of physical Physical may refer to: *Physical examination, a regular overall check-up with a doctor *Physical (album), ''Physical'' (album), a 1981 album by Olivia Newton-John **Physical (Olivia Newton-John song), "Physi ...

Electricity
and
Magnetism Magnetism is a class of physical attributes that are mediated by magnetic field A magnetic field is a vector field In vector calculus and physics, a vector field is an assignment of a vector to each point in a subset of space. For in ...

Magnetism
*CCL: Consultative Committee for
Length Length is a measure of distance Distance is a numerical measurement ' Measurement is the number, numerical quantification (science), quantification of the variable and attribute (research), attributes of an object or event, which can be us ...

Length
*CCM: Consultative Committee for
Mass Mass is the quantity Quantity is a property that can exist as a multitude or magnitude, which illustrate discontinuity and continuity. Quantities can be compared in terms of "more", "less", or "equal", or by assigning a numerical value ...
and Related Quantities *CCPR: Consultative Committee for
PhotometryPhotometry can refer to: * Photometry (optics), the science of measurement of visible light in terms of its perceived brightness to human vision * Photometry (astronomy), the measurement of the flux or intensity of an astronomical object's electroma ...
and
Radiometry Radiometry is a set of techniques for measuring Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events. The scope and application of measurement are dependent on the ...
*CCQM: Consultative Committee for
Amount of Substance In chemistry Chemistry is the study of the properties and behavior of . It is a that covers the that make up matter to the composed of s, s and s: their composition, structure, properties, behavior and the changes they undergo during a ...
- Metrology in
Chemistry Chemistry is the scientific Science () is a systematic enterprise that builds and organizes knowledge Knowledge is a familiarity or awareness, of someone or something, such as facts A fact is an occurrence in the real world. T ...

Chemistry
and
Biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Physiology, physiological mechanisms, Development ...

Biology
*CCRI: Consultative Committee for
Ionizing Radiation Ionizing radiation (or ionising radiation), including nuclear radiation, consists of s or s that have sufficient to s or s by detaching s from them. The particles generally travel at a speed that is greater than 1% of , and the electromagnetic w ...
*CCT: Consultative Committee for
Thermometry , the originator of the era of precision thermometry. He invented the mercury thermometer (first practical, accurate thermometer (mercury-in-glass thermometer) for measurement of room temperature. A thermometer is a device that temperature mea ...
*CCTF: Consultative Committee for
Time Time is the continued sequence of existence and event (philosophy), events that occurs in an apparently irreversible process, irreversible succession from the past, through the present, into the future. It is a component quantity of various me ...

Time
and
Frequency Frequency is the number of occurrences of a repeating event per unit of time A unit of time is any particular time Time is the indefinite continued sequence, progress of existence and event (philosophy), events that occur in an apparen ...

Frequency
*CCU: Consultative Committee for Units The CCU's role is to advise on matters related to the development of the SI and the preparation of the SI brochure. It has liaison with other international bodies such as International Organization for Standardization (ISO), International Astronomical Union (IAU), International Union of Pure and Applied Chemistry (IUPAC) and International Union of Pure and Applied Physics (IUPAP).This is an incomplete list.


Major reports

Official reports of the CIPM include: * Reports of CIPM meetings (''Procès-Verbaux'') (CIPM Minutes) * Annual Report to Governments on the financial and administrative situation of the BIPM * Notification of the contributive parts of the Contracting States * Convocation to meetings of the CGPM * Report of the President of the CIPM to the CGPM From time to time the CIPM has been charged by the CGPM to undertake major investigations related to activities affecting the CGPM or the BIPM. Reports produced include:


The Blevin Report

The Blevin Report, published in 1998, examined the state of worldwide metrology. The report originated from a resolution passed at the 20th CGPM (October 1995) which committed the CIPM to The report identified, amongst other things, a need for closer cooperation between the BIPM and other organisations such as
International Organization of Legal Metrology The International Organization of Legal Metrology (french: Organisation Internationale de Métrologie Légale - OIML), is an intergovernmental organization An intergovernmental organization (IGO) or international organization is an organization co ...
(OIML) and
International Laboratory Accreditation Cooperation The International Laboratory Accreditation Cooperation or ILAC started as a conference in 1977 with the aim of developing international cooperation for facilitating trade by promotion of the acceptance of accredited test and calibration results. In ...
(ILAC) with clearly defined boundaries and interfaces between the organisations. Another major finding was the need for cooperation between accreditation laboratories and the need to involve
developing countries A developing country is a sovereign state with a less developed Industrial sector, industrial base and a low Human Development Index (HDI) relative to other countries. However, this definition is not universally agreed upon. There is also no ...
in the world of metrology.


The Kaarls Report

The Kaarls Report published in 2003 examined the role of the BIPM in the evolving needs for metrology in trade, industry and society.


SI Brochure

The CIPM has responsibility for commissioning the SI brochure, which is the formal definition of the
International system of units The International System of Units, known by the international abbreviation SI in all languages and sometimes Pleonasm#Acronyms_and_initialisms, pleonastically as the SI system, is the modern form of the metric system and the world's most wi ...
. The brochure is produced by the CCU in conjunction with a number of other international organisations. Initially the brochure was only in French – the official language of the metre convention, but recent versions have been published simultaneously in both English and French, with the French text being the official text. The 6th edition was published in 1991, the 7th edition was published in 1998, and the 8th, in 2006. The most recent edition is the 9th edition, published in 2019.BIPM - SI brochure
/ref>


See also

*
History of the metre History (from Greek Greek may refer to: Greece Anything of, from, or related to Greece Greece ( el, Ελλάδα, , ), officially the Hellenic Republic, is a country located in Southeast Europe. Its population is approximately 10.7 millio ...
*
Institute for Reference Materials and MeasurementsThe Institute for Reference Materials and Measurements (IRMM), located in Geel, Belgium Belgium ( nl, België ; french: Belgique ; german: Belgien ), officially the Kingdom of Belgium, is a country in Western Europe. It is bordered by the Net ...
(IRMM) *
National Institute of Standards and Technology The National Institute of Standards and Technology (NIST) is a physical sciences Physical science is a branch of natural science that studies abiotic component, non-living systems, in contrast to life science. It in turn has many branches, e ...
(NIST) *
National Conference on Weights and MeasuresThe National Conference on Weights and Measures (NCWM) is a not-for-profit corporation A nonprofit organization (NPO), also known as a non-business entity, not-for-profit organization, or nonprofit institution, is a legal entity organized and oper ...
(NCWM) United States *
Outline of the metric system Image:FourMetricInstruments.JPG, upright=1.3, "The metric system is for all people for all time." (Condorcet 1791) Four objects used in making measurements in everyday situations that have metric calibrations are shown: a tape measure calibrated i ...
*
Seconds pendulum A seconds pendulum is a pendulum A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity ...


Notes


References

{{DEFAULTSORT:General Conference On Weights And Measures
Conference generale des poids et mesures The General Conference on Weights and Measures ( French: ''Conférence Générale des Poids et Mesures'', abbreviated CGPM and sometimes referred to as the GCWM) is the supreme authority of the International Bureau of Weights and Measures, the in ...
Conference generale des poids et mesures The General Conference on Weights and Measures ( French: ''Conférence Générale des Poids et Mesures'', abbreviated CGPM and sometimes referred to as the GCWM) is the supreme authority of the International Bureau of Weights and Measures, the in ...
Metric system Hauts-de-Seine Organizations based in Paris
International organizations based in France Organizations based in France by subject International organizations by country, France International organizations based in Europe by country, France ...