Convert Grams to Milligrams
One gram equals 1,000 milligrams. Type any value to convert grams to milligrams instantly — with a full reference table below.
Convert Grams to Milligrams
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Conversion formula
To convert grams to milligrams, multiply by 1,000. One gram equals 1,000 mg, and one milligram equals 0.001 g.
Grams to Milligrams table
About converting Grams to Milligrams
Grams (g) and Milligrams (mg) are both units of weight. The exact factor is 1 g = 1,000 mg, so multiply by 1,000 to go from grams to milligrams (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Milligrams to Grams converter, or the full unit converter for every unit at once.
Frequently asked questions
How many milligrams are in one gram?
One gram equals 1,000 milligrams.
How do I convert grams to milligrams?
Multiply the number of grams by 1,000. For example, 10 grams = 10,000 milligrams.
What is 5 grams in milligrams?
5 grams is 5,000 milligrams.