Pounds to Kilograms Converter
Convert pounds to kilograms instantly. Exact factor: 1 lb = 0.45359 kg.
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Convert pounds to kilograms
The exact conversion factor is 1 lb = 0.45359 kg. Type any value and the result updates instantly; the math is shown beneath the board.
Worked by hand
Multiply the pounds value by 2.205 (that is, 1 ÷ 0.45359) to get kilograms.
Worked example
- Take 1 lb
- multiply by 2.205
- the result is 0.45359 kg
How to use it
- Enter your pounds
- Read the kilograms result
- Check the factor line to verify by hand
Frequently asked questions
How many kilograms are in one pounds?
Exactly 0.45359 kg, by the SI/NIST definition.
How do I convert kilograms back to pounds?
Divide by 0.45359 — or use the full converter where both directions are one click.
Is this rounding or exact?
The factor is exact; only the displayed decimals are rounded.