Instantly convert grams (g) to milligrams (mg). Bidirectional, accurate, and free.
To convert grams to milligrams, use the formula milligrams = grams × 1,000. For example, 2 grams equals 2,000 milligrams. Type any number into the calculator above and the result appears instantly — you can also type into the milligrams box to convert the other way.
| Grams | Milligrams |
|---|---|
| 1 g | 1,000 mg |
| 2 g | 2,000 mg |
| 5 g | 5,000 mg |
| 10 g | 10,000 mg |
| 25 g | 25,000 mg |
| 50 g | 50,000 mg |
| 75 g | 75,000 mg |
| 100 g | 100,000 mg |
There are 1,000 milligrams in one gram. To convert any value, apply the formula milligrams = grams × 1,000.
The formula is milligrams = grams × 1,000. Enter a value above and the result updates instantly in both directions.
Yes. It uses the exact internationally-defined conversion factor, so results match official standards to several decimal places.
Yes — the converter is bidirectional. Type in either box and the other updates automatically using the inverse formula.