Pounds to kilograms
One pound is exactly 0.45359237 kilograms. The figure has been fixed by international agreement since 1959, so every country that uses the pound defines it the same way. Type any weight below, or use the chart and shortcuts on this page.
The formula
Pounds to kilograms chart
| Pounds | Kilograms |
|---|---|
| 1 lb | 0.453592 kg |
| 2 lb | 0.907185 kg |
| 5 lb | 2.26796 kg |
| 10 lb | 4.53592 kg |
| 25 lb | 11.3398 kg |
| 50 lb | 22.6796 kg |
| 100 lb | 45.3592 kg |
| 150 lb | 68.0389 kg |
| 200 lb | 90.7185 kg |
| 250 lb | 113.398 kg |
Quick mental math
Cut the pounds in half, then take off about 10% of that half. For 150 lb, half is 75, and 10% of 75 is 7.5, so the answer is about 67.5 kg. The exact answer is 68.04 kg, so the shortcut runs under by roughly 1%.
Going the other way
To convert kilograms back to pounds, multiply by 2.20462 or divide by 0.45359237.
Common questions
How many pounds are in a kilogram?
About 2.20462. To convert kilograms to pounds, multiply by 2.20462 or divide by 0.45359237.
How many kilograms is a stone?
A stone is 14 pounds, which is about 6.35 kg. Stones are still used for body weight in the UK and Ireland.
Is a pound the same in the US and the UK?
Yes. Both use the international avoirdupois pound, defined as 0.45359237 kg.