Gram to Milligram Converter
1 g = 1,000 mg — convert instantly with formula and table.
Enter any number above and the result updates as you type. Everything runs locally in your browser, so it is instant and private.
Quick answer: one gram equals 1,000 milligrams. So to convert grams to milligrams, multiply by 1,000.
How to convert grams to milligrams
milligrams = grams × 1,000
The gram is the metric everyday unit for cooking ingredients, letters and jewelry. Originally defined as the mass of a cubic centimeter of water.
The milligram — one thousandth of a gram — is the unit of medicine dosages and nutrition labels, where tiny quantities matter enormously.
Gram to Milligram conversion table
| Gram (g) | Milligram (mg) |
|---|---|
| 0.01 g | 10 mg |
| 0.1 g | 100 mg |
| 0.25 g | 250 mg |
| 0.4 g | 400 mg |
| 0.75 g | 750 mg |
| 1.25 g | 1,250 mg |
| 1.75 g | 1,750 mg |
| 2.5 g | 2,500 mg |
| 3.5 g | 3,500 mg |
| 4.5 g | 4,500 mg |
| 6 g | 6,000 mg |
| 8 g | 8,000 mg |
| 10 g | 10,000 mg |
| 12 g | 12,000 mg |
| 14 g | 14,000 mg |
| 16 g | 16,000 mg |
| 18 g | 18,000 mg |
| 20 g | 20,000 mg |
| 24 g | 24,000 mg |
| 26 g | 26,000 mg |
| 30 g | 30,000 mg |
| 35 g | 35,000 mg |
| 45 g | 45,000 mg |
| 55 g | 55,000 mg |
| 65 g | 65,000 mg |
| 75 g | 75,000 mg |
| 85 g | 85,000 mg |
| 95 g | 95,000 mg |
| 110 g | 110,000 mg |
| 125 g | 125,000 mg |
| 175 g | 175,000 mg |
| 250 g | 250,000 mg |
| 350 g | 350,000 mg |
| 450 g | 450,000 mg |
| 600 g | 600,000 mg |
| 750 g | 750,000 mg |
| 900 g | 900,000 mg |
| 1,500 g | 1,500,000 mg |
| 2,500 g | 2,500,000 mg |
| 10,000 g | 10,000,000 mg |
Need the opposite direction? Use the Milligram to Gram converter, or read our complete guide to weight conversions for every formula in one place.
Frequently asked questions
How many milligrams are in one gram?
One gram equals 1,000 milligrams. Multiply any gram value by 1,000 to get milligrams.
What is 10 grams in milligrams?
10 grams equal 10,000 milligrams (10 × 1,000).
Is the gram to milligram conversion exact?
The conversion factor used here (1,000) is based on the internationally agreed definitions of both units, so results are exact up to rounding of the final decimal places.
Is my data stored when I use this converter?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.