Pounds to kilograms
Type a value in either box. 1 lb = 0.453592 kg.
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How to convert
To convert pounds to kilograms, divide by 2.204623 (or multiply by 0.453592).
kg = lb × 0.453592
For example: 100 lb ÷ 2.204623 = 45.3592 kg.
A pound is defined as exactly 0.45359237 kilograms.
In your head: Halve it and take off a tenth: 100 lb ≈ 45 kg (exactly 45.36 kg).
When you’ll need it
Newborn weights in the UK are usually announced in pounds and ounces: a 7 lb 8 oz baby weighs about 3.4 kg.
Common values
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.4536 kg |
| 2 lb | 0.9072 kg |
| 5 lb | 2.268 kg |
| 10 lb | 4.5359 kg |
| 20 lb | 9.0718 kg |
| 50 lb | 22.6796 kg |
| 100 lb | 45.3592 kg |
| 120 lb | 54.4311 kg |
| 150 lb | 68.0389 kg |
| 180 lb | 81.6466 kg |
| 200 lb | 90.7185 kg |
| 250 lb | 113.3981 kg |
Questions
- How many pounds make a kilogram?
- 1 kilogram is 2.204623 pounds, so 1 pound = 0.453592 kilograms.
- What is the formula to convert pounds to kilograms?
- kg = lb × 0.453592. A pound is defined as exactly 0.45359237 kilograms.
- What is 100 pounds in kilograms?
- 100 pounds is 45.3592 kilograms.