Grams to Milligrams
Convert grams (g) to milligrams (mg) instantly — with formula and reference table.
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mg
Quick answer: 1 g = 1000 mg. To convert grams to milligrams, multiply by g × 1000.
Converting grams to milligrams
This converter changes a value in grams (g) into milligrams (mg). One gram equals 1000 mg. One gram equals 1,000 milligrams, so grams-to-milligrams is multiplication by 1,000. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
mg = g × 1000
Example
Convert 10 g to mg: 10 × 1000 = 10000 mg.
Grams to Milligrams conversion table
| Grams (g) | Milligrams (mg) |
|---|---|
| 1 g | 1000 mg |
| 2 g | 2000 mg |
| 3 g | 3000 mg |
| 5 g | 5000 mg |
| 10 g | 10000 mg |
| 20 g | 20000 mg |
| 25 g | 25000 mg |
| 50 g | 50000 mg |
| 100 g | 100000 mg |
Popular grams to milligrams conversions
Quick answers for the g values people look up most often:
- 4 g = 4000 mg
- 6 g = 6000 mg
- 7 g = 7000 mg
- 8 g = 8000 mg
- 9 g = 9000 mg
- 12 g = 12000 mg
- 15 g = 15000 mg
- 30 g = 30000 mg
- 40 g = 40000 mg
- 60 g = 60000 mg
- 75 g = 75000 mg
- 80 g = 80000 mg
- 90 g = 90000 mg
- 150 g = 150000 mg
- 200 g = 200000 mg
- 250 g = 250000 mg
- 500 g = 500000 mg
- 1000 g = 1000000 mg
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How to use this converter
- Enter a value in the grams (g) field.
- Read the converted value in milligrams (mg) below.
- Type into the mg field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many milligrams are in a gram?
1 gram equals 1,000 milligrams.
How do I convert 2.5 g to mg?
2.5 times 1,000 = 2,500 mg.
How many milligrams in a microgram?
1 milligram equals 1,000 micrograms (mcg).
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