Tulnest

Grams to Milligrams

1 Gram = 1,000 Milligrams

Common amounts:

About the gram to milligram conversion

The gram (g) and the milligram (mg) are both units of weight. Convert between mass units — milligrams, grams, kilograms, metric tonnes, pounds, ounces and stones.

To convert grams to milligrams, multiply by 1,000. To go back, multiply milligrams by 0.001.

Reference table

GramsMilligrams
1 g1,000 mg
5 g5,000 mg
10 g10,000 mg
25 g25,000 mg
50 g50,000 mg
100 g100,000 mg

Need the reverse conversion? Convert Milligrams to Grams.

Convert Gram to other weight units

Frequently asked questions

How many milligrams is 1 gram?
1 Gram equals 1,000 Milligrams. To go the other way, 1 Milligram equals 0.001 Grams.
What's the formula to convert grams to milligrams?
Multiply the number of grams by 1,000 to get milligrams. For example, 10 grams × 1,000 = 10,000 milligrams.
Does this converter handle decimals and very large numbers?
Yes. Type any real number, including decimals or values in the trillions. Math runs entirely in your browser — no server round-trip, no sign-up, and nothing to install.