Milligrams to Grams
A milligram is one thousandth of a gram, the standard unit for medication dosages on drug labels. A gram is one thousandth of a kilogram, used for cooking ingredients and other small everyday objects. 1 mg equals 0.001 g, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to mass, measured here against mass's base unit (kg) — every other mass unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
g = mg × 0.001
mg = g × 1,000
Worked example: 5 mg × 0.001 = 0.005 g.
Conversion table
| Milligram (mg) | Gram (g) |
|---|---|
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 3 mg | 0.003 g |
| 5 mg | 0.005 g |
| 10 mg | 0.01 g |
| 20 mg | 0.02 g |
| 25 mg | 0.025 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
| 250 mg | 0.25 g |
| 500 mg | 0.5 g |
| 1,000 mg | 1 g |
Frequently asked
- How many Grams in a milligram?
- 1 mg equals 0.001 g.
- How do I convert Milligrams to Grams?
- Multiply the value in mg by 0.001 to get g. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Milligram and Gram are both defined by a fixed conversion factor to mass's base unit (kg), so the result shown is exact to the precision displayed, not an approximation.