Convert milligrams to grams
Enter a value in milligrams to convert it to grams.
milligrams to grams reference
| milligrams | grams |
|---|---|
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 5 mg | 0.005 g |
| 10 mg | 0.01 g |
| 25 mg | 0.025 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
The conversion factor
One milligram is 0.001 grams. So to convert, multiply your figure in milligrams by 0.001. To go the other way, multiply grams by 1000, or use the grams to milligrams converter.
Doing it in your head
For a quick estimate, round the factor: roughly "divide by 1000". Use the exact converter above when the number matters.
Where this conversion comes up
Recipes, shipping and luggage limits, body weight, and nutrition labels.
See the common unit conversions cheat sheet for the factors worth memorising.
Related tools
Frequently asked questions
How many grams are in a milligram?
1 milligram = 0.001 grams.
What is the formula to convert milligrams to grams?
Multiply the number of milligrams by 0.001. To go back the other way, multiply grams by 1000.
What is 10 milligrams in grams?
10 milligrams = 0.01 grams. The reference table below lists more common values.
Is this converter accurate?
It uses the internationally defined conversion factors and computes at full floating-point precision, then rounds only the displayed result. For everyday purposes it is exact; for legal, engineering or scientific work, confirm the required number of significant figures.
Does it work offline?
Yes. The conversion runs in your browser with no server call, so it keeps working with no connection, and nothing you enter is uploaded.
Last reviewed: September 2026. Figures and formulas are checked against their published sources; see the site's data notes.