How many kilograms are in a pound?

1 lb = 0.453592 kg. To convert any amount, multiply by 0.453592.

How do you convert pounds to kilograms?

Multiply the number of pounds by 0.453592 to get kilograms. The formula is shown in the "How it's calculated" section above.

Where does the conversion factor come from?

It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.

Unit converter — Mass

Pounds to kilograms converter

Convert pounds (lb) to kilograms (kg). Source-cited conversion factor, exact to the displayed precision.

Results are mathematically exact for the displayed precision. How we calculate.

How it's calculated

Convert pounds to kilograms— the formula

Pounds convert to kilograms by multiplying by the published conversion factor. The factor below is exact to the precision shown, sourced from the citation under the formula.

kg = lb × 0.453592

lb = kg × 2.2046

Mass: SI base unit (BIPM). Avoirdupois conversions: 1 lb = 0.45359237 kg (international agreement 1959); 1 oz = 1/16 lb; 1 stone = 14 lb.

Questions

Frequently asked questions

How many kilograms are in a pound?
1 lb = 0.453592 kg. To convert any amount, multiply by 0.453592.
How do you convert pounds to kilograms?
Multiply the number of pounds by 0.453592 to get kilograms. The formula is shown in the "How it's calculated" section above.
Where does the conversion factor come from?
It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.