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Convert grams to milligrams

Instantly convert grams to milligrams using our free online calculator. See the formula and a full reference table below.

1 gram = 1000 milligrams
Formula: grams × 1000 = milligrams

GramMilligram reference table

gramsmilligrams
1 gram1000 milligrams
2 grams2000 milligrams
5 grams5000 milligrams
10 grams10000 milligrams
25 grams25000 milligrams
50 grams50000 milligrams
100 grams100000 milligrams
250 grams250000 milligrams
500 grams500000 milligrams
1000 grams1000000 milligrams

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Frequently asked questions

How many milligrams are in 1 gram?

1 gram equals 1000 milligrams.

What is the formula to convert grams to milligrams?

Multiply the number of grams by 1000 to get the equivalent in milligrams.

Is this converter accurate?

Yes. All conversions use internationally recognized conversion factors with up to 6 decimal places of precision.