Scale or scales may refer to:

Mathematics

* Scale (descriptive set theory), an object defined on a set of points * Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original * Scale factor, a number which scales, or multiplies, some quantity * Long and short scales, how powers of ten are named and grouped in large numbers * Scale parameter, a description of the spread or dispersion of a probability distribution * Feature scaling, a method used to normalize the range of independent variables or features of data * Scale (analytical tool)

Measurements

* Scale (map), the ratio of the distance on a map to the corresponding actual distance * Weighing scale, an instrument used to measure mass * Scale (ratio), the ratio of the linear dimension of the model to the same dimension of the original * Spatial scale, a classification of sizes * Scale ruler, a tool for measuring lengths and transferring measurements at a fixed ratio of length * Vernier scale, the scale on calipers

Music

Scale (music) In music theory, a scale is any set of musical notes ordered by fundamental frequency or pitch. A scale ordered by increasing pitch is an ascending scale, and a scale ordered by decreasing pitch is a descending scale. Often, especially in the ...

, a sequence of ordered musical notes * Scale (string instruments), the sounding length of the strings of an instrument * ''Scale'' (album), a 2006 album by electronic artist Matthew Herbert * "The Scale", a song from '' Our Love to Admire'' by Interpol * Musicians scale, the pay scale set by unions of musicians

Science

Biology

* Scale (anatomy), a rigid plate which grows out of the skin of various animals *

Scale (dermatology) A skin condition, also known as cutaneous condition, is any medical condition that affects the integumentary system—the organ system that encloses the body and includes skin, nails, and related muscle and glands. The major function of this ...

, a secondary skin lesion in humans that resembles animal scales * Scale (insect anatomy), a feature of the wings of moths and butterflies * Scale, a type of trichome, any flat epidermal outgrowth in botany *

Bulb In botany, a bulb is structurally a short stem with fleshy leaves or leaf basesBell, A.D. 1997. ''Plant form: an illustrated guide to flowering plant morphology''. Oxford University Press, Oxford, U.K. that function as food storage organs duri ...

scale, the storage layers of a plant bulb *

Scale insect Scale insects are small insects of the order Hemiptera, suborder Sternorrhyncha. Of dramatically variable appearance and extreme sexual dimorphism, they comprise the infraorder Coccomorpha which is considered a more convenient grouping than the ...

, a waxy coated animal that resembles a fish scale

Chemistry and materials science

* Fouling, sometimes called , a buildup of unwanted substances on a submerged surface * Limescale, a hard, chalky deposit that often builds up inside kettles, hot water boilers, and pipework * Mill scale, the flaky surface on hot rolled steel, consisting of iron oxides * Scale (chemistry), the range of mass or volume of a chemical reaction or process

Other sciences

* Scale (analytical tool), a concept in the study of complex systems and hierarchy theory * Scale (social sciences), a tool for ordering entities by quantitative attributes

Places

Scales, California Scales is an unincorporated community in Sierra County, California, in the 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 primarily located in North ...

, a community in the United States * Scales, Lancashire, part of the village of Newton-with-Scales * Scales, near Kirkoswald, Cumbria, a hamlet * Scales, South Lakeland, Cumbria, England, a village * ''The Scales'', the initial climb of the Chilkoot Pass

Other uses

Scales (surname) The surname Scales has more than one possible origin. In some cases, the surname may originate from a name for someone who lived near huts or sheds. In such cases, the surname is derived from the Middle English ''scale'', ''schole'', ''scole'', m ...

* ''Scales'' (film), a 2019 Saudi Arabian film * Baron Scales, a title in the Peerage of England *

Libra (constellation) Libra is a constellation of the zodiac and is located in the Southern celestial hemisphere. Its name is Latin for weighing scales. Its old astronomical symbol is (♎︎). It is fairly faint, with no first magnitude stars, and lies between Vi ...

, also known as "the scales", or the namesake astrological sign * '' Mizan'' (''Scale'' in English), a treatise on Islam by Javed Ahmed Ghamidi * Pay scale, a system or structure of compensation for work * Scale armour, an early form of armor *

Southern California Linux Expo The Southern California Linux Expo (SCALE) is an annual Linux, open source and free software conference held in Los Angeles, California, since 2002. Despite having Linux in its name, SCALE covers all open source operating systems and software. It i ...

, an open-source software conference held in Los Angeles, California