Convert pounds to kilograms
Enter any value to calculate the result instantly.
pounds to kilograms formula
Multiply pounds by exactly 0.45359237. This page uses the international avoirdupois pound rather than the troy pound used for precious metals.
Conversion table
Use these reference values for a quick comparison. The calculator above accepts positive, negative, decimal, and large values when they are meaningful for the quantity.
| pounds | kilograms |
|---|---|
| 1 lb | 0.45359237 kg |
| 10 lb | 4.5359237 kg |
| 50 lb | 22.6796185 kg |
| 100 lb | 45.359237 kg |
| 150 lb | 68.0388555 kg |
| 200 lb | 90.718474 kg |
How to use this converter
Enter the source measurement in the first field. CalUnit applies the displayed formula and updates the destination value immediately. You can use decimals and negative values, copy the result into your work, and compare it with the reference table. Keep the original unit beside the starting measurement so another reader can verify the calculation. For a different unit pair, open the complete weight conversion guide or the multi-unit weight converter.
When this conversion is useful
Medical and fitness records usually use kilograms internationally. Conversion does not improve the accuracy of the original bathroom or shipping scale reading.
Accuracy and rounding
The unit factor is exact. Preserve the original reading and avoid reporting more decimal places than the measuring device supports.
Standards references
CalUnit checks physical unit relationships against authoritative measurement references. See the NIST Guide to the SI conversion factors and the BIPM SI Brochure. Regional cooking measures and digital storage conventions are identified separately because their names can represent more than one definition.