Indian weights and measures

Before the introduction of the Metric system, one may divide the history of Indian systems of measurement into three main periods: the pre-Akbar's period, the period of the Akbar system, and the British colonial period.

During pre-Akbar period, weights and measure system varied from region to region, commodity to commodity, and rural to urban areas. The weights were based on the weight of various seeds (specially the wheat berry and Ratti) and lengths were based on the length of arms and width of fingers. Akbar realized a need for a uniform system. He elected the barley corn. Unfortunately, this did not replace the existing system. Instead, it just added another system.

British entered India as traders. They accepted barley corn as a unit 'grain' for weighing gold. They minted coins using wheat berry as the standard. Eventually, British introduced their own system for weighing gold (Troy ounce), commodities (Pound/Cwt/Ton). Now, the roads had Furlong and Mile markers. In 1939, Government of India passed the Standards of Weights Act, that came into effect in 1942. This allowed Tola/Seer/Maund system to coexist with Pound/Cwt/Ton system.

In 1941, the Punjab Weights and Measures act provided a sense of uniformity. In 1956, Government of India passed a Standards of Weights and Measures system to introduce metric system based on Punjab Act. The metric would begin in October 1958, making metric weight mandatory by October 1960, and the metric measures mandatory by April 1962.

In 1956, for metric conversion, the Government of India defined the Standards of Weights and Measures Act (No. 89 of 1956, amended 1960, 1964) as follows:

The current definitions as per the UN are:

These are the weights and measures popular in North India before the adoption of the metric system. There were different systems in Bengal, the Presidency of Madras, and Bombay. The following nomenclature was prevalent in North India till the metric system came in:-

4 Chawal (grain of rice) = 1 Dhan (weight of one wheat berry)

4 Dhan = 1 Ratti (Ratti is the seed of the 'Abrus precatorius'. It is a red seed with a black spot at one end. Abul Fazl refers to it as 'Surkh' in Ain-i-Akbari.).

8 Ratti = 1 Masha

12 Masha (96 Ratti) = 1 bhari

24 Ratti (96 Dhan) = 1 Tak

Conversion

1 Bhari = 11.66375 gram

3.75 Troy ounce = 10 bhari

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Wikipedia