Milligrams to Grams
Convert milligrams (mg) to grams (g) instantly — with formula and reference table.
mg
g
Quick answer: 1 mg = 0.001 g. To convert milligrams to grams, multiply by mg × 0.001.
Converting milligrams to grams
This converter changes a value in milligrams (mg) into grams (g). One milligram equals 0.001 g. One gram equals 1,000 milligrams, so converting milligrams to grams means dividing by 1,000. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
g = mg × 0.001
Example
Convert 10 mg to g: 10 × 0.001 = 0.01 g.
Milligrams to Grams conversion table
| Milligrams (mg) | Grams (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 |
How to use this converter
- Enter a value in the milligrams (mg) field.
- Read the converted value in grams (g) below.
- Type into the g field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many grams are in a milligram?
1 milligram equals 0.001 grams (one thousandth).
How do I convert 500 mg to grams?
500 divided by 1,000 = 0.5 grams.
Why are doses given in milligrams?
Medicines and supplements use milligrams because typical doses are small fractions of a gram.