Direct conversion
Convert pound [lb] to kilogram [kg] instantly with formula, examples, chart, and FAQs.
1 pound [lb] = 0.453592 kilogram [kg]
1 pound [lb] = 0.453592 kilogram [kg]
Example: 1 pound [lb] equals 0.453592 kilogram [kg].
Weight and mass conversions use kilogram as the reference unit. Common factors include 1 pound = 0.45359237 kilogram and 1 ounce = 0.028349523125 kilogram.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
The pound is a US customary and imperial mass unit equal to exactly 0.45359237 kilograms.
HistoryThe avoirdupois pound became the standard pound for general weight measurement in the modern yard-pound system.
Current usePounds are common for body weight, shipping, food labels, gym equipment, and consumer products in the United States.
The kilogram is the SI base unit of mass and is the reference unit for the weight and mass converter.
HistoryThe kilogram was historically tied to a physical prototype and is now defined using the Planck constant.
Current useKilograms are used for body weight, groceries, shipping, science, medicine, fitness, and commercial weighing.
| pound [lb] | kilogram [kg] |
|---|---|
| 1 | 0.453592 |
| 2 | 0.907185 |
| 5 | 2.267962 |
| 10 | 4.535924 |
| 20 | 9.071847 |
| 25 | 11.339809 |
| 50 | 22.679619 |
| 100 | 45.359237 |
| 1000 | 453.59237 |
Use this formula: 1 pound [lb] = 0.453592 kilogram [kg] Enter your value in the calculator and the result updates instantly.
1 pound [lb] equals 0.453592 kilogram [kg].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.