Density and Mass
mgtokg
Convert milligrams (mg) to kilograms (kg).
Factor1 mg = 1e-6 kg
Converter
mg
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kg
Rendered to 6 significant figures.
Formula
Formula
kg = mg × 1e-6
Multiply any value in milligrams by 1e-6 to obtain the value in kilograms.
Worked example
Convert 1.00000e+6 mg to kg.
- 01Start with 1.00000e+6 mg.
- 02Multiply by the conversion factor: 1.00000e+6 × 1e-6 = 1 kg.
Result1.00000e+6 mg = 1 kg
Conversion table
| mg | kg |
|---|---|
| 1 | 1e-6 |
| 2 | 2e-6 |
| 5 | 5e-6 |
| 10 | 1e-5 |
| 20 | 2e-5 |
| 50 | 5e-5 |
| 100 | 1e-4 |
| 200 | 0.0002 |
| 500 | 0.0005 |
| 1000 | 0.001 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mg to kg?
1 mg equals 1e-6 kg. To convert, multiply the value in milligrams by 1e-6.
How do I convert 1 mg to kg?
1 mg = 1e-6 kg. For any value, multiply by 1e-6.
How do I convert kg back to mg?
Divide by the same factor — or equivalently, multiply by 1000000. So 1 kg = 1.00000e+6 mg.
When would I need to convert milligram to kilogram?
Mass conversions appear in material balances, reagent dosing, and reconciling vendor specifications across imperial/metric systems.
Is the conversion exact?
Yes. Both mg and kg are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).