Direct answer
How Many mg in a Gram? 1 g = 1000 mg
1 gram equals 1000 milligrams. Direct metric answer with formula, examples, and free mg ↔ g converter links.
Question
How many milligrams are in a gram?
1 gram (g) equals 1000 milligrams (mg).
1 g
1000 mg
1 mg
0.001 g
Formula
mg = g × 1000
Category
Weight / mass
Explanation
The prefix milli- means one thousandth, so 1 mg = 0.001 g and 1000 mg = 1 g.
To convert grams to milligrams, multiply by 1000. To convert milligrams to grams, divide by 1000.
This metric relationship is exact for mass labels in science, pharmacy, and nutrition.