Convert grams to milligrams
1 g = 1000 mg — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
1000mg
1 g = 1000 mg
How to convert grams to milligrams
Multiply the number of grams by 1000 to get milligrams.
The exact factor is 1000 .
Gram to Milligram conversion table
| Grams (g) | Milligrams (mg) |
|---|---|
| 1 g | 1000 |
| 2 g | 2000 |
| 3 g | 3000 |
| 5 g | 5000 |
| 10 g | 10 000 |
| 20 g | 20 000 |
| 25 g | 25 000 |
| 50 g | 50 000 |
| 100 g | 100 000 |
| 250 g | 250 000 |
| 500 g | 500 000 |
| 1000 g | 1 000 000 |
Milligram to Gram conversion table
| Milligrams (mg) | Grams (g) |
|---|---|
| 1 mg | 0.001 |
| 2 mg | 0.002 |
| 3 mg | 0.003 |
| 5 mg | 0.005 |
| 10 mg | 0.01 |
| 20 mg | 0.02 |
| 25 mg | 0.025 |
| 50 mg | 0.05 |
| 100 mg | 0.1 |
| 250 mg | 0.25 |
| 500 mg | 0.5 |
| 1000 mg | 1 |
Frequently asked
How many milligrams are in a gram?
One gram equals 1000 milligrams (g → mg). That figure is exact, not rounded.
How do you convert grams to milligrams?
Multiply the number of grams by 1000 to get milligrams.
What is 1 mg in grams?
One milligram is 0.001 grams.
What is 10 g in mg?
10 g = 10 000 mg.