Convert Milligrams to Grams
1 milligram is 0.001 g. One milligram is exactly 0.001 grams.
One milligram is 0.001 grams. To convert milligrams to grams, multiply by 0.001; to go the other way, divide by 0.001 or multiply by 1000. The factor is exact rather than rounded: it follows from NIST Handbook 44. One thousandth of a gram, and exactly 1,000 micrograms.
Factor checked against the defining standard · How we check
Grams
0.001 g
- Milligrams × 0.001
value * 0.0010.001 g
1 milligram in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 0.00003527396195 oz | × 0.0000352739619496 |
| pounds | 0.000002204622622 lb | × 0.00000220462262185 |
| stone | 0.0000001574730444 st | × 0.000000157473044418 |
| US tons | 0.000000001102311311 ton | × 0.00000000110231131092 |
| micrograms | 1,000 mcg | × 1,000 |
| milligrams (as entered) | 1 mg | — |
| grams | 0.001 g | × 0.001 |
| kilograms | 0.000001 kg | × 0.000001 |
| tonnes | 0.000000001 t | × 0.000000001 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert milligrams to grams?
- 1.Take the measurement in milligrams.
- 2.Multiply by 0.001 — that is how many grams fit in one milligram.
- 3.To go back the other way, divide by 0.001, or multiply by 1000.
Milligrams to grams conversion table
| Milligrams | Grams |
|---|---|
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 3 mg | 0.003 g |
| 4 mg | 0.004 g |
| 5 mg | 0.005 g |
| 6 mg | 0.006 g |
| 7 mg | 0.007 g |
| 8 mg | 0.008 g |
| 9 mg | 0.009 g |
| 10 mg | 0.01 g |
| 12 mg | 0.012 g |
| 15 mg | 0.015 g |
| 20 mg | 0.02 g |
| 25 mg | 0.025 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
What are milligrams and grams?
- Milligram (mg)
- One thousandth of a gram, and exactly 1,000 micrograms. The unit almost every medicine is dosed in.
- Gram (g)
- One thousandth of a kilogram, and the unit nutrition labels use worldwide.
Questions people actually ask
- How many grams are in a milligram?
- 0.001. One thousandth of a kilogram, and the unit nutrition labels use worldwide.
- How do I convert grams back to milligrams?
- Divide by 0.001, or multiply by 1000 — they are the same operation.
Other weight conversions
Grams to milligrams — the same conversion the other way.