Pounds to Kilograms
Convert pounds to kilograms instantly. 1 lb = 0.45359237 kg. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert pounds to kilograms
To convert pounds to kilograms, divide by 2.2046226218 (multiply by 0.45359237). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
kg = lb × 0.45359237
Pounds to Kilograms conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Pounds | Kilograms |
|---|---|
| 1 lb | 0.453592 kg |
| 2 lb | 0.907185 kg |
| 3 lb | 1.360777 kg |
| 5 lb | 2.267962 kg |
| 10 lb | 4.535924 kg |
| 20 lb | 9.071847 kg |
| 25 lb | 11.339809 kg |
| 50 lb | 22.679619 kg |
| 100 lb | 45.359237 kg |
| 500 lb | 226.796185 kg |
| 1,000 lb | 453.59237 kg |
What is a pound?
Exactly 0.45359237 kg by international agreement.
What is a kilogram?
The SI base unit of mass, defined since 2019 by the Planck constant.
The formula
kg = lb × 0.45359237
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Pounds to Kilograms
- Type the number of pounds you want to convert.
- Read the result in kilograms straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked kilograms to pounds page.
Pounds to Kilograms — frequently asked questions
How many kilograms are in a pound?
One pound equals 0.45359237 kg. kg = lb × 0.45359237
What is the formula to convert pounds to kilograms?
The formula is kg = lb × 0.45359237. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert kilograms back to pounds?
Divide instead of multiplying: one kilogram is 2.2046226218 lb. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this pounds to kilograms free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the pounds to kilograms.
- pounds to kilograms
- lb to kilos
- lb to kilograms
- lbs to kg
- lbs to kilos
- lbs to kilograms
- pounds to kg
- pounds to kilos
About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error