Convert Grams to Milligrams
1 gram is 1,000 mg. One gram is exactly 1000 milligrams.
One gram is 1000 milligrams. To convert grams to milligrams, multiply by 1000; to go the other way, divide by 1000 or multiply by 0.001. The factor is exact rather than rounded: it follows from NIST Handbook 44. One thousandth of a kilogram, and the unit nutrition labels use worldwide.
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Milligrams
1,000 mg
- Grams × 1000
value * 10001,000 mg
1 gram in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 0.03527396195 oz | × 0.0352739619496 |
| pounds | 0.002204622622 lb | × 0.00220462262185 |
| stone | 0.0001574730444 st | × 0.000157473044418 |
| US tons | 0.000001102311311 ton | × 0.00000110231131092 |
| micrograms | 1,000,000 mcg | × 1,000,000 |
| milligrams | 1,000 mg | × 1,000 |
| grams (as entered) | 1 g | — |
| kilograms | 0.001 kg | × 0.001 |
| tonnes | 0.000001 t | × 0.000001 |
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 grams to milligrams?
- 1.Take the measurement in grams.
- 2.Multiply by 1000 — that is how many milligrams fit in one gram.
- 3.To go back the other way, divide by 1000, or multiply by 0.001.
Grams to milligrams conversion table
| Grams | Milligrams |
|---|---|
| 1 g | 1,000 mg |
| 2 g | 2,000 mg |
| 3 g | 3,000 mg |
| 4 g | 4,000 mg |
| 5 g | 5,000 mg |
| 6 g | 6,000 mg |
| 7 g | 7,000 mg |
| 8 g | 8,000 mg |
| 9 g | 9,000 mg |
| 10 g | 10,000 mg |
| 12 g | 12,000 mg |
| 15 g | 15,000 mg |
| 20 g | 20,000 mg |
| 25 g | 25,000 mg |
| 50 g | 50,000 mg |
| 100 g | 100,000 mg |
What are grams and milligrams?
- Gram (g)
- One thousandth of a kilogram, and the unit nutrition labels use worldwide.
- Milligram (mg)
- One thousandth of a gram, and exactly 1,000 micrograms. The unit almost every medicine is dosed in.
Questions people actually ask
- How many milligrams are in a gram?
- 1000. One thousandth of a gram, and exactly 1,000 micrograms. The unit almost every medicine is dosed in.
- How do I convert milligrams back to grams?
- Divide by 1000, or multiply by 0.001 — they are the same operation.
Other weight conversions
Milligrams to grams — the same conversion the other way.