Density and Mass
kgtomg
Convert kilograms (kg) to milligrams (mg).
Factor1 kg = 1000000 mg
Converter
kg
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mg
Rendered to 6 significant figures.
Formula
Formula
mg = kg × 1000000
Multiply any value in kilograms by 1000000 to obtain the value in milligrams.
Worked example
Convert 1 kg to mg.
- 01Start with 1 kg.
- 02Multiply by the conversion factor: 1 × 1000000 = 1.00000e+6 mg.
Result1 kg = 1.00000e+6 mg
Conversion table
| kg | mg |
|---|---|
| 1 | 1.0000e+6 |
| 2 | 2.0000e+6 |
| 5 | 5.0000e+6 |
| 10 | 1e+7 |
| 20 | 2e+7 |
| 50 | 5e+7 |
| 100 | 1e+8 |
| 200 | 2e+8 |
| 500 | 5e+8 |
| 1000 | 1e+9 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kg to mg?
1 kg equals 1000000 mg. To convert, multiply the value in kilograms by 1000000.
How do I convert 1 kg to mg?
1 kg = 1.00000e+6 mg. For any value, multiply by 1000000.
How do I convert mg back to kg?
Divide by the same factor — or equivalently, multiply by 1e-6. So 1 mg = 1e-6 kg.
When would I need to convert kilogram to milligram?
Mass conversions appear in material balances, reagent dosing, and reconciling vendor specifications across imperial/metric systems.
Is the conversion exact?
Yes. Both kg and mg are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).