Pounds to Kilograms Converter.
Pounds and kilograms are the two most common units for body weight, shipping, and everyday measurements. One pound equals exactly 0.45359237 kilograms under the international avoirdupois pound definition adopted in 1959.
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Conversion formula
Divide the pound value by 2.204622622 to get kilograms. (factor: 0.45359237)
1 lb = 0.45359237 kg
Quick reference table
| lb | kg |
|---|---|
| 1 lb | 0.45359237 kg |
| 5 lb | 2.26796185 kg |
| 10 lb | 4.5359237 kg |
| 25 lb | 11.33980925 kg |
| 50 lb | 22.6796185 kg |
| 100 lb | 45.359237 kg |
| 150 lb | 68.0388555 kg |
| 200 lb | 90.718474 kg |
Need the reverse? Try ourKilogram to Pound.
Pound to Kilogram FAQ
How many kilograms are in a pound?
One pound equals 0.45359237 kilograms. To convert, multiply the pound value by 0.45359237.
Why is the lb to kg conversion factor 0.45359237?
The avoirdupois pound was defined in 1959 as exactly 0.45359237 kg, replacing earlier approximations. This exact factor is used in science, trade, and aviation worldwide.
Is a kilogram heavier than a pound?
Yes. One kilogram equals about 2.20462 pounds, so a kilogram is roughly twice as heavy as a pound.