Grain to Gram Converter
Convert grains to grams. Used in pharmacy, ballistics, and precious metals.
100 grains =
6.47989 g
Also Equals
6.47989
Grams (g)
6,479.89
Milligrams (mg)
Formula
grams = grains × 0.0647989
100 gr × 0.0647989 = 6.47989 g
Common Conversions
1 grain
= 0.065 g
15.43 grains
= 1 g
100 grains
= 6.48 g
437.5 grains
= 1 oz
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: NIST Guide to SI Units
by National Institute of Standards
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.