How to convert grams to milligrams
To convert grams to milligrams, use the formula mg = g × 1,000. In other words, multiply the number of grams by 1,000 to get the equivalent in milligrams. For example, 5 g equals 5,000 mg.
Grams to MG Converter
Convert grams to milligrams instantly. 5 g = 5,000 mg.
1 g = 1,000 mg
| Grams (g) | MG (mg) |
|---|---|
| 1 g | 1,000 mg |
| 2 g | 2,000 mg |
| 3 g | 3,000 mg |
| 4 g | 4,000 mg |
| 5 g | 5,000 mg |
| 6 g | 6,000 mg |
| 7 g | 7,000 mg |
| 8 g | 8,000 mg |
| 9 g | 9,000 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 |
| 40 g | 40,000 mg |
| 50 g | 50,000 mg |
| 75 g | 75,000 mg |
| 100 g | 100,000 mg |
| 250 g | 250,000 mg |
| 500 g | 500,000 mg |
| 1,000 g | 1,000,000 mg |
Gram and Milligram
The gram (g) and the milligram (mg) are both units of weight. This page gives you an instant, exact conversion between them, a reference table for the most common values, and the underlying formula so you can check the maths yourself. All calculations run in your browser — nothing you type is sent anywhere.
Need to go the other way? Use the MG to Grams converter. For all units at once, try the full Weight Converter.
Frequently Asked Questions
How do I convert grams to milligrams?
Use the formula mg = g × 1,000. For example, 5 g equals 5,000 mg. Just enter your value in the converter above to get an instant result.
What is 1 gram in milligrams?
1 g = 1,000 mg. You can multiply any number of grams by this figure to convert it, or use the calculator above for exact results.
How do I convert milligrams back to grams?
Use the reverse conversion: 1 mg = 0.001 g. Our MG to Grams converter does this for you.