Convert Ounce (oz) to Grain (gr)
To convert Ounce to Grain, multiply the value by 437.499998. For example, 1 Ounce = 437.499998 gr and 10 Ounce = 4,374.999981 gr. Both Ounce and Grain are units of Weight. Enter any value above for an instant, accurate result.
One Ounce equals 437.499998 gr.
Use the formula: gr = oz × 437.499998.