1.1 This standard is intended to serve as a guide in converting numerical values of physical quantities from one system of units of measurement to another system of units; in particular, it should assist the designer and the draftsman in converting dimensions and tolerances on engineering drawings from inches to millimetres.
1.1.1 It also deals with the conversion of monetary values of interest to administrators, traders and industrialists.
1.2 The significance of specified values and how to interpret them for conversion are also discussed.
IS 787-1956 history
1957IS 787-1956 Guidelines for converting values from one system of units to another