How to convert grams to milligrams
mg = g × 1,000
Example: 5 g × 1,000 = 5,000 mg
Grams to Milligrams table
| Grams (g) | Milligrams (mg) |
|---|---|
| 0.5 g | 500 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 |
About these units
Grams (g): A gram is one thousandth of a kilogram, used for food, ingredients, jewellery and postage.
Milligrams (mg): A milligram is one thousandth of a gram, used for medicine doses and nutrients.
Frequently asked questions
How many milligrams are in 1 gram?
1 gram equals 1,000 milligrams (mg).
How do I convert g to mg?
Multiply the value in grams by 1,000. For example, 5 g × 1,000 = 5,000 mg.
How do I convert milligrams back to grams?
Multiply by 0.001 (or divide by 1,000). 1 mg = 0.001 g.
What is a gram?
A gram is one thousandth of a kilogram, used for food, ingredients, jewellery and postage.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every weight / mass unit at once? Use the Weight Converter.