milligram to gram
Convert milligram (mg) to gram (g). Use an editable mass converter, conversion formula, and reference table.
1 mg = 0.001 g
Conversion formula
One milligram equals 0.001 gram. Multiply your value in milligram by this factor to get gram. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 milligram:5 × 0.001 = 0.005 g
Conversion table
| milligram (mg) | gram (g) |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1000 | 1 |
About these measurements
Mass quantifies an amount of matter.
The base reference used here is the gram. One milligram is 0.001 base units; one gram is 1 base units.
Important distinctions
Mass is not force. Avoirdupois ounces and troy ounces have different masses.
Precision
The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.
Common questions
How do I convert mg to g?
Multiply the quantity in mg by 0.001. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the gram to milligram converter.
Reference
NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.
