1 mg = 0.0154324 gr (milligram → grain)
1 mg = 0.0154324 gr
1 milligram equals 0.0154324 grains. To convert milligrams to grains, multiply the milligram value by 0.0154324. For quick reference: 1 mg = 0.0154324 gr, 5 mg = 0.0771618 gr, 10 mg = 0.154324 gr, 100 mg = 1.54324 gr.
Grains = Milligrams × 0.0154324Start with your value in milligrams.
Multiply the milligram value by 0.0154324. This is the exact conversion factor from milligrams to grains.
The product is your value in grains. For example, 5 mg × 0.0154324 = 0.0771618 gr.
The exact factor from milligrams to grains is 0.0154324.
Grains = Milligrams × 0.0154324
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Milligrams (mg) | Grains (gr) |
|---|---|
| 0.1 mg | 0.0015432 gr |
| 0.25 mg | 0.0038581 gr |
| 0.5 mg | 0.0077162 gr |
| 1 mg | 0.015432 gr |
| 1.5 mg | 0.023149 gr |
| 2 mg | 0.030865 gr |
| 2.5 mg | 0.038581 gr |
| 3 mg | 0.046297 gr |
| 4 mg | 0.061729 gr |
| 5 mg | 0.077162 gr |
| 6 mg | 0.092594 gr |
| 7 mg | 0.10803 gr |
| 8 mg | 0.12346 gr |
| 9 mg | 0.13889 gr |
| 10 mg | 0.15432 gr |
| 12 mg | 0.18519 gr |
| 15 mg | 0.23149 gr |
| 18 mg | 0.27778 gr |
| 20 mg | 0.30865 gr |
| 25 mg | 0.38581 gr |
| 30 mg | 0.46297 gr |
| 35 mg | 0.54013 gr |
| 40 mg | 0.61729 gr |
| 45 mg | 0.69446 gr |
| 50 mg | 0.77162 gr |
| 60 mg | 0.92594 gr |
| 70 mg | 1.0803 gr |
| 75 mg | 1.1574 gr |
| 80 mg | 1.2346 gr |
| 90 mg | 1.3889 gr |
| 100 mg | 1.5432 gr |
| 120 mg | 1.8519 gr |
| 125 mg | 1.929 gr |
| 150 mg | 2.3149 gr |
| 175 mg | 2.7007 gr |
| 180 mg | 2.7778 gr |
| 200 mg | 3.0865 gr |
| 225 mg | 3.4723 gr |
| 250 mg | 3.8581 gr |
| 275 mg | 4.2439 gr |
| 300 mg | 4.6297 gr |
| 350 mg | 5.4013 gr |
| 400 mg | 6.1729 gr |
| 450 mg | 6.9446 gr |
| 500 mg | 7.7162 gr |
| 600 mg | 9.2594 gr |
| 750 mg | 11.574 gr |
| 1000 mg | 15.432 gr |
| 2000 mg | 30.865 gr |
| 5000 mg | 77.162 gr |
A grain of table salt weighs about 0.3 mg. A standard aspirin tablet contains 325 mg of active ingredient. In grains, that gives you: 1 mg = 0.0154324 gr, 10 mg = 0.154324 gr, 100 mg = 1.54324 gr.
The milligram (mg) equals one-thousandth of a gram, or one-millionth of a kilogram. It is the standard unit for drug dosages on pharmaceutical labels, vitamin and supplement content, and fine laboratory measurements where a gram would be too coarse.
The grain (gr) equals exactly 64.79891 milligrams — historically the weight of a single grain of barley, and the common base unit underlying both the avoirdupois and troy weight systems (7,000 grains = 1 avoirdupois pound). It survives today in ammunition (bullet and gunpowder charge weights) and archery (arrow and bow draw-weight specs).
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