Enter a value and select Convert.
Exact relationship and formula
1 gram = 1,000 milligrams exactly. Grams = milligrams ÷ 1,000.
Reverse mode applies the inverse relationship from the same exact definition.
Worked example
1 mg = 0.001 g; 250 mg = 0.25 g; 1,000 mg = 1 g.
This is only a generic mass-unit conversion. It does not calculate medication doses, concentrations, prescriptions, supplements, or medical recommendations.
Common milligrams reference values
| Milligrams | Conversion |
|---|---|
| 1 mg | 0.001 g |
| 10 mg | 0.01 g |
| 100 mg | 0.1 g |
| 250 mg | 0.25 g |
| 500 mg | 0.5 g |
| 1000 mg | 1 g |
| 2500 mg | 2.5 g |
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