How to convert milligrams to grams
To convert milligrams to grams, multiply by 0.001. Weight and mass conversions matter for cooking, shipping, fitness tracking, medicine and trade.
Milligram to Gram conversion table
| Milligram (mg) | Gram (g) |
|---|---|
| 0.1 mg | 0.0001 g |
| 0.5 mg | 0.0005 g |
| 1 mg | 0.001 g |
| 2 mg | 0.002 g |
| 3 mg | 0.003 g |
| 4 mg | 0.004 g |
| 5 mg | 0.005 g |
| 10 mg | 0.01 g |
| 20 mg | 0.02 g |
| 25 mg | 0.025 g |
| 50 mg | 0.05 g |
| 100 mg | 0.1 g |
| 500 mg | 0.5 g |
| 1,000 mg | 1 g |
About the units
Milligram (mg)
A milligram is one thousandth of a gram, typically used for medication doses and nutrition labels.
Gram (g)
A gram is one thousandth of a kilogram and the everyday metric unit for food and small items.
How to use this converter
- Type the number of milligrams (mg) in the input box.
- The result in grams appears instantly — no button needed.
- See the same value in every other weight unit just below.
- Use “Swap units” to convert grams back to milligrams.
When you’ll use the milligram to gram conversion
Converting milligrams to grams comes up more often than you might expect — for example when following a recipe written in grams, shipping a parcel priced per kilogram, or checking luggage against an airline limit. Type your number once and you get the exact answer plus every related unit, so you don’t need to convert twice.
💡 The factor is exact and easy to remember: 1 mg = 0.001 g.
Watch out for these mix-ups
- Mixing the avoirdupois ounce with the fluid ounce (volume).
- Confusing the metric ton (1,000 kg) with the US short ton (907 kg).
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many grams are in one milligram?
One milligram equals 0.001 grams. 0.001 is the exact factor used by this converter.
How do I convert milligrams to grams?
Multiply the value in milligrams by 0.001. To go the other way, multiply grams by 1,000.
What is 10 mg in g?
10 mg = 0.01 g. Also, 5 mg = 0.005 g and 100 mg = 0.1 g.
What is the difference between a milligram and a gram?
A milligram is one thousandth of a gram, typically used for medication doses and nutrition labels. A gram is one thousandth of a kilogram and the everyday metric unit for food and small items.
Is this tool free and private?
Yes — the Milligram to Gram is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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