Metrication in India Metrication in India Metrication or metrification is the process of converting to the metric system based on the International System of Units (SI). India's conversion to the metric system occurred in stages between 1955 and 1962. The metric system in weights and measures was adopted by the Indian Parliament in December 1956 with the "Standards of Weights and Measures Act", which took effect beginning 1 October 1958. The "Indian Coinage Act" was passed in 1955 by the Government of India to introduce decimal coinage in the country. The new system of coins became legal tender on April 1957, where the
Three Counties System Ireby Fell Cavern in 1949. The existence for the Three Counties System was first mooted by Dave Brook in 1968, when he proposed that the many fragmented systems stretching from Barbondale in the north, to Kingsdale in the south, could be part of a much larger system. Over the next 43 years, many discoveries by many cavers gradually knitted the fragments together, but the two most significant dates were 30 May 2010 when Rift Pot was connected to Ireby Fell Cavern linking systems of North Yorkshire and Lancashire for the first time, and 6 November 2011, when Notts II was