g to mg
Convert Gram to Milligram
Convert Gram to Milligram instantly with the tool above. The conversion factor is 1,000, meaning 1 gram equals 1,000 milligrams. Type any value and the result updates immediately — no ads, no page reloads, no clutter.
Type a number above. The result updates instantly — no buttons, no reloads.
1 Gram = 1,000 milligrams
1 Milligram = 0.001 grams
Quick reference
Common grams converted to milligrams at a glance.
| g | mg |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
How to convert grams to milligrams
To convert a value from grams to milligrams, multiply the gram value by 1,000 milligrams. For example, 10 grams × that factor = 10,000 milligrams.
This gram to milligram converter runs entirely in your browser, so results appear instantly with no page reload, no advertisements and no sign-up.
Frequently asked questions
How many milligrams are in 1 gram?+
1 gram is equal to 1,000 milligrams.
How do you convert grams to milligrams?+
To convert grams to milligrams, multiply the gram value by 1,000. For example, 10 grams × 1,000 = 10,000 milligrams.
What is the formula to convert grams to milligrams?+
Gram → Milligram: value × 1,000. Equivalently, 1 gram = 1,000 milligrams.
Is this Gram to Milligram converter free to use?+
Yes. This gram to milligram converter is completely free, works instantly in your browser, and contains no advertisements, popups or sign-up.