About the Units
grain (gr)
A unit of mass equal to 64.79891 milligrams, originally based on the weight of a grain of barley.
ounce (oz)
A unit of mass equal to 1/16 of a pound or approximately 28.35 grams.
Common Conversions
- 1 gr = 0.0022857145 oz
- 437.49997 gr = 1 oz