To convert pounds (lb) to kilograms (kg), multiply by the exact factor 0.45359237:
kg = lb × 0.45359237
If you just want the answer, use our Lbs to Kg converter (runs locally in your browser).
Why the conversion factor is 0.45359237
The factor comes from the international agreement that defines the pound in terms of kilograms. Because it’s exact, you can use it confidently for calculations that need consistency across systems.
Examples: common lbs to kg conversions
- 150 lb →
150 × 0.45359237 = 68.0388555 kg(≈ 68.04 kg) - 200 lb →
200 × 0.45359237 = 90.718474 kg(≈ 90.72 kg) - 1 lb →
0.45359237 kg
Reverse conversion (kg to lbs)
To convert kilograms to pounds, divide by the same factor:
lb = kg ÷ 0.45359237
Try the reverse tool: Kg to Lbs.
Next: one page for all conversions
If you switch between weight and length conversions, use the Unit Converter to keep everything in one place.