Convert pounds to kilograms instantly using the exact international pound relationship, plus worked examples and reverse conversion.
Multiply pounds by 0.45359237. One international avoirdupois pound equals exactly 0.45359237 kilogram. Enter any number above and the result updates instantly. The calculator keeps additional precision internally and displays a readable result for everyday use.
Pounds appear on U.S. body-weight, luggage and shipping measurements, while kilograms are standard internationally. Confirm whether a shipping limit uses scale weight or dimensional weight.
Keep extra decimal places until the final step when the value will be used in another calculation. For regulated, engineering, medical or safety-critical work, follow the precision and reference standards required by that application.
Multiply pounds by 0.45359237. One international avoirdupois pound equals exactly 0.45359237 kilogram.
Yes. Select the reverse option above or use the full category converter for additional units.
Calculation review: Formula and representative examples reviewed October 8, 2026.