Pounds to Kilograms Converter
1 pound = 0.45359237 kilograms
1 pound equals 0.453592 kilograms
How to convert pounds to kilograms
These units measure mass. Pounds and ounces mean avoirdupois unless the unit explicitly says troy; a fluid ounce measures volume and requires a density to relate it to mass.
kg = lb × 0.45359237One pound is 0.45359237 kilograms, so a single multiplication converts any value.
4.53592 kg ≈ 10 × 0.45359237Pounds to kilograms conversion table
Common values in pounds, converted to kilograms.
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.45359237 |
| 2 | 0.90718474 |
| 3 | 1.3607771 |
| 4 | 1.8143695 |
| 5 | 2.2679619 |
| 10 | 4.5359237 |
| 20 | 9.0718474 |
| 25 | 11.339809 |
| 50 | 22.679619 |
| 100 | 45.359237 |
| 250 | 113.39809 |
| 500 | 226.79619 |
| 1,000 | 453.59237 |
About these units
poundlb
The avoirdupois pound: exactly 0.45359237 kilograms.
Reference: International Yard and Pound Agreement (1959).
kilogramkg
The SI base unit of mass, defined by fixing the Planck constant.
Reference: BIPM SI Brochure (9th ed.).
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.