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Convert grams to milligrams

1 gram equals 1000 milligrams. Type any number below — the other side updates instantly.

Grams to milligrams — quick reference

gramsmilligrams
0.001 g1 mg
0.01 g10 mg
0.1 g100 mg
0.5 g500 mg
1 g1000 mg
2 g2000 mg
5 g5000 mg
10 g10000 mg
25 g25000 mg
50 g50000 mg
100 g100000 mg
500 g500000 mg

How to convert

Multiply the number of grams by 1000 to get milligrams. To go the other way, multiply milligrams by 0.001 to get grams. The conversion factor is fixed and exact, so you can use this on any value.

About these units

Grams

Definition
A gram (symbol: g) is one-thousandth of a kilogram, the SI base unit of mass. 1 g is roughly the mass of a paper clip.
History
Originally defined as the mass of one cubic centimeter of water at 4°C. The kilogram has since become the base unit, with the gram derived from it.
Current use
Standard for cooking, food labels, medication, jewelry, and small-quantity science worldwide outside the United States.

Frequently asked

How many milligrams are in 1 gram?
1 gram = 1000 milligrams.
How do you convert grams to milligrams?
Multiply the number of grams by 1000 to get milligrams. To go the other way, multiply milligrams by 0.001 to get grams. The conversion factor is fixed and exact, so you can use this on any value.
What is 5 grams in milligrams?
5 grams = 5000 milligrams.
Reverse conversionMilligrams to grams

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