The weight conversions are to 10 decimal places and are given in all common units of weight measurement.
Imperial pounds ( 0.45359237 kg ) are used by:
United States of America, South Africa, United Kingdom, Eire, India, Canada, Australia and other former British colonies.
The Japanese 1 yen coin has a mass of one gram. (lighter than the British penny (3.56 g), the United States cent (2.5 g) or the "Euro-cent" (2.30 g)).
Wikipedia links covering units of mass show/hide