Grain to Milligram Converter.
The smallest common unit in the avoirdupois system, used in ballistics and medicine. Converting to milligrams: One thousandth of a gram, common on nutrition labels and in medicine. One grain equals 64.79891 mg.
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Conversion formula
Multiply the grain value by 64.79891 to get milligrams. (factor: 64.79891)
1 gr = 64.79891 mg
Quick reference table
| gr | mg |
|---|---|
| 1 gr | 64.79891 mg |
| 2 gr | 129.59782 mg |
| 5 gr | 323.99455 mg |
| 10 gr | 647.9891 mg |
| 25 gr | 1,619.97275 mg |
| 50 gr | 3,239.9455 mg |
| 100 gr | 6,479.891 mg |
| 250 gr | 16,199.7275 mg |
Need the reverse? Try ourMilligram to Grain.
Grain to Milligram FAQ
How many milligrams are in one grain?
One grain equals 64.79891 mg. Multiply by 64.79891 to convert any value.
How do you convert gr to mg?
Multiply the grain value by 64.79891 to get milligrams.
When would you use grains vs milligrams?
The smallest common unit in the avoirdupois system, used in ballistics and medicine. One thousandth of a gram, common on nutrition labels and in medicine.