Convert Pounds to Kilograms

Instantly convert pounds (lb) to kilograms (kg). Enter a value to see the result and the conversion formula.

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How our Pounds to Kilograms unit converter works

To ensure maximum accuracy when converting Pounds to Kilograms, our calculator uses a scientific pivot method. Instead of relying on a potentially inaccurate direct conversion, the system first converts lb into the base unit of the International System (the kilogram), then recalculates the result into kg. This approach drastically reduces rounding errors.

About this conversion

While US citizens think exclusively in pounds, Canadians and international travelers often need to convert to kilograms for medical, scientific, or official travel purposes (like luggage limits).

When to use this conversion

Essential when checking your airline baggage allowance at LAX or Pearson, where limits are strictly enforced in kilograms for international flights.

Formula

Kilograms (kg) = Pounds (lb) × 0.453592

Tip: You can swap units and convert decimals. Results are rounded for readability.

Examples

Pounds (lb) Kilograms (kg)
1 lb 0.453592 kg
2 lb 0.907184 kg
5 lb 2.26796 kg
10 lb 4.53592 kg
20 lb 9.07184 kg
50 lb 22.6796 kg
100 lb 45.3592 kg
250 lb 113.398 kg
500 lb 226.796 kg
1000 lb 453.592 kg

FAQ

How much do standard gym plates weigh in kilograms?

A standard 45-pound Olympic barbell plate is equivalent to about 20.4 kilograms.

Why do Canadian recipes still use pounds for butter?

It's a historical habit. A 'pound' of butter in Canada is sold as a 454g block, which is exactly one pound.