A yojana (

Sanskrit Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had diffused there from the northwest in the late ...

: योजन; th, โยชน์; my, ယူဇနာ) is a measure of

distance Distance is a numerical or occasionally qualitative measurement of how far apart objects or points are. In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.g. "two counties over"). ...

that was used in ancient

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...

and

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...

. A yojana is about 12–15 km.

Edicts of Ashoka (3rd century BCE)

Ashoka Ashoka (, ; also ''Asoka''; 304 – 232 BCE), popularly known as Ashoka the Great, was the third emperor of the Maurya Empire of Indian subcontinent during to 232 BCE. His empire covered a large part of the Indian subcontinent, ...

, in his Major Rock Edict No.13, gives a distance of 600 yojanas between India, presumably

Pataliputra Pataliputra ( IAST: ), adjacent to modern-day Patna, was a city in ancient India, originally built by Magadha ruler Ajatashatru in 490 BCE as a small fort () near the Ganges river.. Udayin laid the foundation of the city of Pataliputra at the ...

, and "where the

Yona The word Yona in Pali and the Prakrits, and the analogue Yavana in Sanskrit and Yavanar in Tamil, were words used in Ancient India to designate Greek speakers. "Yona" and "Yavana" are transliterations of the Greek word for " Ionians" ( grc, ...

king named Antiyoga (is ruling)", identified as King

Antiochus II Theos Antiochus II Theos ( grc-gre, Ἀντίοχος Θεός, ; 286 – July 246 BC) was a Greek king of the Hellenistic Seleucid Empire who reigned from 261 to 246 BC. He succeeded his father Antiochus I Soter in the winter of 262–61 BC. He wa ...

, whose capital was in

Babylon ''Bābili(m)'' * sux, 𒆍𒀭𒊏𒆠 * arc, 𐡁𐡁𐡋 ''Bāḇel'' * syc, ܒܒܠ ''Bāḇel'' * grc-gre, Βαβυλών ''Babylṓn'' * he, בָּבֶל ''Bāvel'' * peo, 𐎲𐎠𐎲𐎡𐎽𐎢 ''Bābiru'' * elx, 𒀸𒁀𒉿𒇷 ''Babi ...

. Since Pataliputra and Babylon are at a distance of about 4000 km, this would give a yojana of about 7 km.

Yojana as per ''Vishnu Purana''

Yojana is defined in Chapter 6 of Book 1 of the ''

Vishnu Purana The Vishnu Purana (IAST:, sa, विष्णुपुराण) is one of the eighteen Puranas#Mahapuranas, Mahapuranas, a genre of ancient and medieval texts of Hinduism. It is an important Pancharatra text in the Vaishnavism literature c ...

'' (one of the eighteen Mahapuranas) as follows:

Units

Variations on length

The length of the yojana varies depending on the different standards adopted by different Indian astronomers. In the '' Surya Siddhanta'' (late 4th-century CE–early 5th-century CE), for example, a yojana was equivalent to , and the same was true for

Aryabhata Aryabhata ( ISO: ) or Aryabhata I (476–550 CE) was an Indian mathematician and astronomer of the classical age of Indian mathematics and Indian astronomy. He flourished in the Gupta Era and produced works such as the ''Aryabhatiya'' (which ...

's '' Aryabhatiya'' (499). However, 14th-century

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

Paramesvara Vatasseri Parameshvara Nambudiri ( 1380–1460) was a major Indian mathematician and astronomer of the Kerala school of astronomy and mathematics founded by Madhava of Sangamagrama. He was also an astrologer. Parameshvara was a proponent of o ...

defined the yojana to be about 1.5 times larger, equivalent to about . A. C. Bhaktivedanta Swami Prabhupada gives the equivalent length of a yojana as about throughout his translations of the

Bhagavata Purana The ''Bhagavata Purana'' ( sa, भागवतपुराण; ), also known as the ''Srimad Bhagavatam'', ''Srimad Bhagavata Mahapurana'' or simply ''Bhagavata'', is one of Hinduism's eighteen great Puranas (''Mahapuranas''). Composed in Sa ...

. Some other traditional Indian scholars give measurements between 6.4 km and 8 km (4–5 miles) or thereabouts. In ''The Ancient Geography of India'', Alexander Cunningham says that a yojana is traditionally held to be between 8 and 9 miles and calculates by comparison with Chinese units of length that it could have been between and . Alexander Cunningham
Measures of Distance. Yojana, Li, Krosa.
in ''The Ancient Geography of India: I. I. The Buddhist Period, Including the Campaigns of Alexander, and the Travels of Hwen-Thsang'', Trübner and Company, 1871, pp. 571-574

Edicts of Ashoka (3rd century BCE)

Yojana as per ''Vishnu Purana''

Units

Variations on length

See also

References

Further reading