Milligrams to Kilograms converter
Convert milligrams (mg) to Kilograms (kg). Calculate a value, check the formula and compare common measurements.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Value | Enter value using the definition in the method and example. |
| From | Select the unit or currency in which the entered number is currently expressed. |
| To | Select the unit or currency you need for the answer. |
Understanding your result
The converted value describes the same mass quantity in the selected target unit. Display rounding does not add precision to the original measurement.
Common mistakes
- Confusing the source and target units, or overlooking a prefix or case-sensitive symbol.
- Confusing avoirdupois, troy and other explicitly different mass definitions.
Check your calculation
- Convert to the target unit and then reverse the direction. Within display rounding, you should recover the original value.
Read the mass measurement guide · Calculation checks, sources and review limits
How do I convert milligrams to kilograms?
Enter the value in milligrams to find the same mass quantity in kilograms. The number changes to match the unit; the underlying quantity stays the same. Check the definitions below when a unit has more than one convention.
Common uses
- Compare package or equipment masses.
- Translate ingredient weights between mass units.
How it works
For the displayed direction, 1 mg equals 0.000001 kg. The engine converts through the shared mass base quantity. Pounds and ounces use international avoirdupois mass. US tons are short tons; a metric carat is 200 mg. The multiplier is derived from the two centralized unit factors. Keep full precision until the final result; displayed answers use up to 12 significant digits.
Worked example
10 mg converts to 0.00001 kg. For the reverse direction, swap the units and enter 0.00001 kg; the result is approximately 10 mg.
FAQ
How do I convert mg to kg?
kg = mg × 0.000001
Which definition is used?
Pounds and ounces use international avoirdupois mass. US tons are short tons; a metric carat is 200 mg.
Common values
Use “Swap units” above for the reverse conversion. Values below are rounded to six significant digits.
| milligrams | Kilograms |
|---|---|
| 1 | 0.000001 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 20 | 0.00002 |
| 30 | 0.00003 |
| 50 | 0.00005 |
| 100 | 0.0001 |