Unit Converters Formula • Published on July 30, 2026 • Last updated July 30, 2026
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Mass in international avoirdupois pounds
Equivalent mass in metric kilograms
One international avoirdupois pound is legally defined as exactly 0.45359237 kilograms. To convert pounds to kilograms, multiply the mass in pounds by 0.45359237 (or divide by 2.20462262).
By international agreement (1959), 1 pound is defined as exactly 0.45359237 kilograms.
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