Pounds to Kilograms (lb to kg) Converter
1 pound equals 0.45359237 kilograms (kg) — multiply pounds by 0.45359237 to convert. This is the exact international definition of the avoirdupois pound.
The formula
To convert pounds to kilograms, multiply by the exact factor:
kg = lb × 0.45359237
For example, 150 lb × 0.45359237 = 68.04 kg. To reverse it, divide by 0.45359237 (or multiply by 2.204623).
Conversion table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.45359237 |
| 2 | 0.90718474 |
| 3 | 1.36077711 |
| 5 | 2.26796185 |
| 10 | 4.5359237 |
| 25 | 11.33980925 |
| 50 | 22.6796185 |
| 100 | 45.359237 |
| 500 | 226.796185 |
| 1000 | 453.59237 |
How to convert online
- Type the number of pounds in the first box.
- Read the kilogram result instantly in the second box.
- Enter a kg value to convert back the other way.
Use the Pound to Kilogram Converter — free and instant in your browser.
Where this conversion is used
Pounds to kilograms is one of the most searched conversions worldwide: bodyweight and gym targets, luggage and shipping limits, medical dosing, and any spec sheet that lists mass in kg while the reader thinks in pounds. The exact factor keeps health and freight figures precise.
FAQ
How many kilograms are in a pound?
One pound equals 0.45359237 kilograms. So 10 pounds is about 4.54 kg.
What is the formula to convert pounds to kilograms?
Multiply the pound value by 0.45359237: kg = lb × 0.45359237.
How do I convert kilograms back to pounds?
Divide by 0.45359237, or multiply by 2.204623. For example, 4.5359237 kg ÷ 0.45359237 = 10 pounds.
Is the conversion exact?
Yes. The pound is defined as exactly 0.45359237 kilograms, so there is no rounding.
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