Milligrams to Grams Converter
Convert milligrams to grams instantly. 1 mg = 0.001 g. Free two-way converter with the formula and a quick reference table.
How to convert milligrams to grams
grams = milligrams × 0.001
One milligram equals 0.001 grams, so to convert milligrams to grams you multiply by 0.001. Going the other way, one gram is 1,000 milligrams. Both units measure weight & mass, so the conversion is an exact ratio that never changes.
10 milligrams = 0.01 grams. Multiply your milligram figure by the factor above (or just type it into the box) to convert any amount.
Need the other direction? grams to milligrams
milligrams to grams table
| milligrams (mg) | grams (g) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
Frequently asked questions
How many grams are in a milligram?
One milligram equals 0.001 grams. So to convert, multiply the number of milligrams by 0.001.
How do I convert milligrams to grams?
Multiply by 0.001, or simply enter the value in the converter above — it does the math instantly and works both ways.
Is this conversion exact?
Yes — both units measure the same quantity, so the ratio is fixed and this uses the standard internationally-agreed factor.