Convert pounds to kilograms
Converting pounds to kilograms is a common weight task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 lb equals 0.453592 kg, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert pounds to kilograms
To convert pounds to kilograms, multiply the number of pounds by 0.453592. For example, 10 lb × 0.453592 = 4.53592 kg.
kg = lb × 0.453592
- Write down the value in pounds you want to convert.
- Multiply it by 0.453592 (the exact lb→kg factor).
- The result is your value in kilograms. Check it below with the converter or the table.
Conversion table
Common values of pounds and their equivalents in kilograms:
| lb | kg |
|---|---|
| 1 | 0.453592 |
| 2 | 0.907185 |
| 3 | 1.36078 |
| 4 | 1.81437 |
| 5 | 2.26796 |
| 10 | 4.53592 |
| 20 | 9.07185 |
| 25 | 11.3398 |
| 50 | 22.6796 |
| 100 | 45.3592 |
| 250 | 113.398 |
| 500 | 226.796 |
About these units
Pound (lb). The avoirdupois pound is defined as exactly 0.45359237 kilograms, or 16 ounces. It is the everyday unit of body weight and produce in the United States.
Kilogram (kg). The kilogram is the SI base unit of mass, defined by fixing Planck's constant since 2019. It is the everyday standard for body weight, groceries and cargo worldwide.
Frequently asked questions
How do I convert pounds to kilograms?
To convert pounds to kilograms, multiply the number of pounds by 0.453592. For example, 10 lb × 0.453592 = 4.53592 kg. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many kilograms are in 1 pound?
1 lb = 0.453592 kg. That is the fixed relationship used by this converter and by international standards.
How many pounds are in 1 kilogram?
1 kg = 2.20462 lb. If you are converting in the opposite direction, use our Kilogram to Pound converter for the dedicated table and FAQ.
Is the pounds to kilograms conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.453592 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is pound used for?
The avoirdupois pound is defined as exactly 0.45359237 kilograms, or 16 ounces. It is the everyday unit of body weight and produce in the United States.