Convert Kilograms to Milligrams
One kilogram equals 1,000,000 milligrams. Type any value to convert kilograms to milligrams instantly — with a full reference table below.
Convert Kilograms to Milligrams
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How to convert Kilograms to Milligrams
To convert kilograms to milligrams, multiply by 1,000,000. One kilogram equals 1,000,000 mg, and one milligram equals 0.000001 kg.
- Take the value in kilograms — for example 7.5 kg.
- Multiply by 1,000,000 (the number of milligrams in one kilogram).
- 7.5 × 1,000,000 = 7,500,000 mg.
Shortcut: the factor is a power of ten, so just move the decimal point 6 places to the right.
Kilograms to Milligrams conversion table
| Kilograms | Milligrams |
|---|---|
| 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 |
| 12 kg | 12,000,000 mg |
| 15 kg | 15,000,000 mg |
| 20 kg | 20,000,000 mg |
| 25 kg | 25,000,000 mg |
| 50 kg | 50,000,000 mg |
| 100 kg | 100,000,000 mg |
| Milligrams | Kilograms |
|---|---|
| 1 mg | 0.000001 kg |
| 2 mg | 0.000002 kg |
| 3 mg | 0.000003 kg |
| 4 mg | 0.000004 kg |
| 5 mg | 0.000005 kg |
| 6 mg | 0.000006 kg |
| 7 mg | 0.000007 kg |
| 8 mg | 0.000008 kg |
| 9 mg | 0.000009 kg |
| 10 mg | 0.00001 kg |
| 12 mg | 0.000012 kg |
| 15 mg | 0.000015 kg |
| 20 mg | 0.00002 kg |
| 25 mg | 0.000025 kg |
| 50 mg | 0.00005 kg |
| 100 mg | 0.0001 kg |
About converting Kilograms to Milligrams
Kilograms (kg) and Milligrams (mg) are both units of weight. The exact factor is 1 kg = 1,000,000 mg, so multiply by 1,000,000 to go from kilograms to milligrams (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Milligrams to Kilograms converter, or the full unit converter for every unit at once.
Real-world weight in kilograms and milligrams
| Example | Kilograms | Milligrams |
|---|---|---|
| A US nickel coin | 0.005 kg | 5,000 mg |
| 1 litre of water | ≈ 1 kg | ≈ 1,000,000 mg |
| An Olympic men's barbell | 20 kg | 20,000,000 mg |
| A typical checked-bag limit (economy) | ≈ 23 kg | ≈ 23,000,000 mg |
“≈” marks typical values; the rest are defined or measured figures.
The units
The SI base unit of mass, defined since 2019 by fixing the Planck constant at 6.62607015 × 10⁻³⁴ J·s.
Used for: Body weight and goods almost everywhere.
One thousandth of a gram.
Used for: Medicine doses and nutrition labels.
These factors are exact: since 1959 the avoirdupois pound is defined as exactly 0.45359237 kg, and the ounce as 1/16 of that.