How to convert kilograms to milligrams
mg = kg × 1,000,000Multiply the value in kilograms by 1,000,000. To go the other way, multiply by 0.000001 (or divide by 1,000,000).
A kilogram is larger than a milligram: one kilogram contains 1,000,000 milligrams.
Worked examples
- 1 kilogram1 kg × 1,000,000 = 1,000,000 mg
- 5 kilograms5 kg × 1,000,000 = 5,000,000 mg
- 10 kilograms10 kg × 1,000,000 = 10,000,000 mg
- 20 kilograms20 kg × 1,000,000 = 20,000,000 mg
- 100 kilograms100 kg × 1,000,000 = 100,000,000 mg
Kilograms to milligrams conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Kilograms (kg) | Milligrams (mg) |
|---|---|
| 0.1 kg | 100,000 mg |
| 0.25 kg | 250,000 mg |
| 0.5 kg | 500,000 mg |
| 1 kg | 1,000,000 mg |
| 2 kg | 2,000,000 mg |
| 3 kg | 3,000,000 mg |
| 4 kg | 4,000,000 mg |
| 5 kg | 5,000,000 mg |
| 6 kg | 6,000,000 mg |
| 7 kg | 7,000,000 mg |
| 8 kg | 8,000,000 mg |
| 9 kg | 9,000,000 mg |
| 10 kg | 10,000,000 mg |
| Kilograms (kg) | Milligrams (mg) |
|---|---|
| 12 kg | 12,000,000 mg |
| 15 kg | 15,000,000 mg |
| 20 kg | 20,000,000 mg |
| 25 kg | 25,000,000 mg |
| 30 kg | 30,000,000 mg |
| 40 kg | 40,000,000 mg |
| 50 kg | 50,000,000 mg |
| 75 kg | 75,000,000 mg |
| 100 kg | 100,000,000 mg |
| 250 kg | 250,000,000 mg |
| 500 kg | 500,000,000 mg |
| 1,000 kg | 1,000,000,000 mg |
About the units
Kilogram (kg)
The SI base unit of mass, defined since 2019 through the Planck constant. A litre of water has a mass of almost exactly 1 kg.
Milligram (mg)
One thousandth of a gram. Medication doses and vitamin contents are usually given in milligrams. One milligram equals 0.000001 kilograms (kg).
Frequently asked questions
How many milligrams are in one kilogram?
There are 1,000,000 milligrams in one kilogram, and this value is exact by definition.
How do I convert kilograms to milligrams?
Multiply the number of kilograms by 1,000,000. For example, 10 kg × 1,000,000 = 10,000,000 mg.
How many kilograms are in one milligram?
One milligram equals 0.000001 kilograms. That is the reverse factor, 1 ÷ 1,000,000.
What is 10 kilograms in milligrams?
10 kg = 10,000,000 mg.
Is this kg to mg converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.