Convert Milligrams to Kilograms
mg to kg · weight & mass conversion
What are milligrams and kilograms?
A milligram is one-thousandth of a gram, used for medication doses and tiny quantities. The kilogram is the SI base unit of mass, defined since 2019 by the Planck constant. For scale: a 70 kg adult weighs about 154 lb, and a bag of sugar is usually 1 kg (2.2 lb).
How to convert milligrams to kilograms
1 mg = 0.000001 kg. To convert, multiply the number of milligrams by 0.000001. For example, 5 mg = 0.000005 kg, and 20 mg = 0.00002 kg. To go the other way, multiply kilograms by 1,000,000 (since 1 kg = 1,000,000 mg).
Milligrams to Kilograms conversion table
| Milligrams (mg) | Kilograms (kg) |
|---|---|
| 1 | 0.000001 |
| 2 | 0.000002 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 100 | 0.0001 |
FAQ
What is 1 mg in kg?
1 mg = 0.000001 kg. To convert any amount, multiply the number of milligrams by 0.000001.
How do I convert kilograms back to milligrams?
Go the other way: 1 kg = 1,000,000 mg, so multiply kilograms by 1,000,000 to get milligrams.
Is a milligram bigger than a kilogram?
No — 1 mg is the smaller unit, equal to 0.000001 kg (it takes 1,000,000 mg to make one kg).
Are these weight & mass conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.