Convert pound to kilogram

1 pound = 0.4535924 kilograms. Enter any value below for an exact conversion.

Value in pounds

1 lb =

0.4535924 kg

kilograms

Need the reverse? Convert kilogram to pound →

Formula

1 pound = 0.4535924 kilograms
kilogram = pounds × 0.4535924
pound = kilograms × 2.204623

pound to kilogram conversion table

1 lb0.4535924 kg

2 lb0.9071847 kg

3 lb1.360777 kg

5 lb2.267962 kg

10 lb4.535924 kg

20 lb9.071847 kg

25 lb11.33981 kg

50 lb22.67962 kg

100 lb45.35924 kg

1000 lb453.5924 kg

About converting pounds to kilograms

Pounds to kilograms is needed when a weight given in US or UK pounds has to be entered into a metric form — medical dosages, gym equipment, luggage, or freight. One pound is exactly 0.45359237 kilograms.

Method & sources

Conversions use exact legal definitions rather than rounded approximations: 1 inch = 2.54 cm and 1 pound = 0.45359237 kg (fixed by the 1959 international yard and pound agreement), 1 mile = 1.609344 km, and 1 US liquid gallon = 3.785411784 litres. Temperatures convert with °F = °C × 9⁄5 + 32 and K = °C + 273.15. Results are rounded only for display.

Page last updated: October 1, 2026

Frequently asked questions

How many kilograms are in a pound?

One pound equals 0.4535924 kilograms. So 10 pounds is 4.535924 kilograms. Use the converter above for any value.

What is the formula to convert pounds to kilograms?

1 pound = 0.4535924 kilograms kilogram = pounds × 0.4535924 pound = kilograms × 2.204623

Is the pound-to-kilogram conversion exact?

Yes. The conversion factor between pounds and kilograms is defined exactly, so results are precise — only rounded for display.

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