Grains to Milligrams Converter
Convert grains (gr) to milligrams (mg)
Result
64.79891 mg
Milligrams
1 gr = 64.79891 mg
1 gr in other units
- 1Enter a valueType the number to convert
- 2Pick the unitsChoose what to convert from and to
- 3Read the resultSee it in every other unit too
How to convert grains to milligrams
One grain equals 64.79891 milligrams, so multiply the number of grains by 64.79891.
mg = gr × 64.79891
1 gr = 64.79891 mg · 1 mg = 0.01543236 gr
Worked example
To convert 5 grains to milligrams: 5 gr × 64.79891 = 323.9945 mg.
About grains (gr)
A grain is exactly 64.79891 mg, used for bullets, arrows and some medicines.
About milligrams (mg)
A milligram is one thousandth of a gram. Medicine doses and nutrition labels often use milligrams.
More conversions
Grains to other units
Other units to Milligrams
Frequently asked questions
How many milligrams are in one grain?
One grain equals 64.79891 milligrams.
How many grains are in one milligram?
One milligram equals 0.01543236 grains.
How do I convert grains to milligrams?
Use the formula mg = gr × 64.79891. For example, 5 gr × 64.79891 = 323.9945 mg.