Convert Milligrams to Grams

Enter the value in milligrams to get its exact equivalent in grams instantly.

How to convert milligrams to grams?

To convert a measurement in milligrams (mg) to grams (g), we multiply the value by the conversion factor 0.001.

g = mg × 0.001

The milligram (one thousandth of a gram) is the standard unit for expressing medication doses, since it allows very small amounts of active ingredient to be indicated with precision.

Milligrams (mg) Grams (g)
1.00 0.001000
5.00 0.005000
10.00 0.0100
50.00 0.0500
100.00 0.1000

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Frequently Asked Questions

How many grams are in 1 milligram?

1 mg equals exactly 0.001 grams.

Why are medicines dosed in milligrams instead of grams?

Because the active doses of most drugs are very small (often between 1 and 500 mg), and expressing them in grams would produce impractical decimal figures for safe prescribing and dosing.