G to MG Converter
Type a value in grams to see it in milligrams as you type, with the exact formula and a reference chart.
- Free
- No sign-up
- Private
How this was calculated
- 1 gram = 1,000 milligrams
- 2 × 1,000 = 2,000 mg
| g | 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 |
| 0.2 g | 200 mg |
| 0.25 g | 250 mg |
| 0.3 g | 300 mg |
| 0.5 g | 500 mg |
| 0.6 g | 600 mg |
| 0.75 g | 750 mg |
| 1 g | 1,000 mg |
| 1.5 g | 1,500 mg |
| 2 g | 2,000 mg |
| 2.5 g | 2,500 mg |
| 3 g | 3,000 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 |
| 50 g | 50,000 mg |
| 100 g | 100,000 mg |
| 500 g | 500,000 mg |
| 1,000 g | 1,000,000 mg |
| mg | g |
|---|---|
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 5 mg | 0.005 g |
| 10 mg | 0.01 g |
| 20 mg | 0.02 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
| 200 mg | 0.2 g |
| 500 mg | 0.5 g |
| 1,000 mg | 1 g |
| 2,000 mg | 2 g |
| 5,000 mg | 5 g |
How to convert grams to milligrams
1 gram = 1,000 milligrams. To convert grams to milligrams, multiply by 1,000. A gram is one thousandth of a kilogram. A milligram is one thousandth of a gram.
Worked examples
- 0.5 grams = 500 mg (0.5 × 1,000)
- 2 grams = 2,000 mg (2 × 1,000)
- 25 grams = 25,000 mg (25 × 1,000)
Where this conversion comes up
Grams are used for food labels, baking scales and jewelry; milligrams for medicine doses, vitamins, caffeine and sodium on labels. One gram is 1,000 milligrams: 0.5 g is 500 mg and 2.3 g of sodium (the daily limit) is 2,300 mg. Medicine labels and nutrition facts use mg for anything under a gram.
Quick estimate
Multiply by 1,000.
Common mistakes
- Dividing instead of multiplying. A milligram is smaller than a gram, so the number of milligrams must come out larger: 0.5 grams = 500 mg.
Related weight converters: grams to ounces, oz to grams, oz to lbs, lbs to oz, grams to pounds, pounds to grams.
Frequently asked questions
How do you convert grams to milligrams?
Multiply the grams by 1,000. For example, 2 grams is 2,000 milligrams.
How many milligrams are in one gram?
One gram is 1,000 milligrams. A gram is one thousandth of a kilogram.
What is 25 grams in milligrams?
25 grams is 25,000 milligrams.
Is there a quick way to estimate grams to milligrams?
Multiply by 1,000.