Convert Gram (g) to Milligram (mg) instantly. Enter any value — result updates live.
Converting Gram to Milligram is a common weight conversion. One gram (g) equals 1,000 milligram (mg). Grams are used for food nutrition labels, cooking recipes, and lightweight measurements.
This conversion is commonly needed for grocery shopping abroad, cooking and recipe conversions, fitness and body weight tracking. Milligrams are used in pharmaceuticals, nutrition, and chemical measurements.
To put gram in perspective: a US nickel coin (5 g). In milligram, common references include a daily caffeine limit (about 400 mg).
A gram was originally defined as the mass of one cubic centimeter of water at 4°C.
Milligrams are precise enough that pharmaceutical dosing regulations often require manufacturing tolerances within a few milligrams to ensure medication safety.
People frequently convert between gram and milligram for:
| Gram (g) | Milligram (mg) |
|---|---|
| 1 g | 1,000 mg |
| 2 g | 2,000 mg |
| 5 g | 5,000 mg |
| 10 g | 10,000 mg |
| 15 g | 15,000 mg |
| 20 g | 20,000 mg |
| 25 g | 25,000 mg |
| 30 g | 30,000 mg |
| 50 g | 50,000 mg |
| 100 g | 100,000 mg |
| 200 g | 200,000 mg |
| 500 g | 500,000 mg |
| 1000 g | 1,000,000 mg |