Grain is mass unit, symbol: [gr]. Definition of 1 grain ≡ 1⁄7000 lb av . The grain is the same in avoirdupois, troy, and apothecaries units of mass, ≡ 64.79891 mg. Compared to kilogram, grain is smaller unit.
• 1 [gr] = (exactly) `6.479891*10^-05` [kg]
• 1 [kg] = (exactly) `1/(6.479891*10^-05)` [gr] = 15432.358352941 [gr]
Multiply convert of grain to common mass units:[gr]
Mass units sort by name in ABC order
National Institute of Standards and Technology (October 2011). Butcher, Tina; Cook, Steve; Crown, Linda et al. eds. Appendix C – General Tables of Units of Measurement (PDF) old. C-6. http://www.nist.gov/pml/wmd/pu...