High Quality Content by WIKIPEDIA articles! The history of measurement systems in India begins in early Indus Valley Civilization with the earliest surviving samples dated to the 5th millennium BCE. Since early times the adoption of standard weights and measures has reflected in the country`s architectural, folk, and metallurgical artifacts. A complex system of weights and measures was adopted by the Maurya empire (322–185 BCE), which also formulated regulations for the usage of this system. Later, the Mughal empire (1526–1857) used standard measures to determine land holdings and collect land tax as a part of Mughal land reforms. The formal metrication in India is dated to April 1, 1957 when the Indian Government adopted the International System of Units (SI).