The traditional system of weights and measures in India is quite different from the modern metric system. Traditional weights were based on the weight of various seeds (specially the wheat berry and Ratti) while lengths were based on the length of arms and width of fingers. As you would expect if you consider the size of India and its various peoples, this was not a consistent system and values often varied from kingdom to kingdom. Units also often varied from commodity to commodity as well making the whole thing rather confusing. The eventual Islamic and then, British colonial influence didn't help matters much.
In 1956, Government of India passed the Standards of Weights Act, that came into effect in 1958.The metric weights were made mandatory by October 1960, and the metric measures by April 1962.
On this site, we are looking to make it easy to convert between these various systems and values. While efforts have been taken to keep things as accurate as possible, errors might still creep in. If you do find any, please let us know by emailing us at webmaster (at) syzygy (dot) in.