How to convert grams to milligrams
A gram is equal to 1,000 milligrams. To convert grams to milligrams, multiply the gram value by 1,000.
Milligrams = Grams × 1,000 Example: 0.25 g × 1,000 = 250 mg Grams to milligrams decimal shortcut
Because grams and milligrams are metric units, you can convert grams to milligrams by moving the decimal point three places to the right.
- 0.005 g → 5 mg
- 0.05 g → 50 mg
- 0.5 g → 500 mg
- 1.5 g → 1,500 mg
- 2.5 g → 2,500 mg
Common grams to milligrams conversions
| Grams (g) | Milligrams (mg) |
|---|---|
| 0.001 g | 1 mg |
| 0.005 g | 5 mg |
| 0.01 g | 10 mg |
| 0.025 g | 25 mg |
| 0.05 g | 50 mg |
| 0.1 g | 100 mg |
| 0.25 g | 250 mg |
| 0.5 g | 500 mg |
| 0.75 g | 750 mg |
| 1 g | 1,000 mg |
| 2 g | 2,000 mg |
| 2.5 g | 2,500 mg |
| 5 g | 5,000 mg |
| 10 g | 10,000 mg |
Common grams to milligrams examples
0.1 g to mg: 0.1 × 1,000 = 100 mg.
0.25 g to mg: 0.25 × 1,000 = 250 mg.
0.5 g to mg: 0.5 × 1,000 = 500 mg.
1 g to mg: 1 × 1,000 = 1,000 mg.
5 g to mg: 5 × 1,000 = 5,000 mg.
Need a smaller mass unit? Use our Milligrams to Micrograms Converter or Micrograms to Milligrams Converter.
Frequently asked questions
How many mg is 1 gram?
There are exactly 1,000 milligrams in 1 gram.
How do I convert grams to mg?
Multiply the number of grams by 1,000. For example, 0.25 g × 1,000 = 250 mg.
How many mg is 0.5 grams?
0.5 grams is exactly equal to 500 milligrams.
How many mg is 5 grams?
5 grams is exactly equal to 5,000 milligrams.
How many grams are in 1,000 mg?
1,000 milligrams is exactly equal to 1 gram.
Convert milligrams to grams
Need to convert in the opposite direction? Use our Milligrams to Grams converter to convert milligrams into grams.