Pounds to Kilograms
Type a value in Pounds and get the result in Kilograms, calculated exactly.
1 Pounds = 0.45359237 Kilograms
Precision
Exact factorThis result is exact.
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Formula
kg = lb × 0.45359237
To convert Pounds to Kilograms, multiply the value by 0.45359237.
Worked examples
- 1 lb × 0.45359237 = 0.45359237 kg
- 100 lb × 0.45359237 = 45.359237 kg
- 50 lb × 0.45359237 = 22.6796185 kg
This factor is exact by definition.
Conversion table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.45359237 |
| 2 | 0.90718474 |
| 3 | 1.36077711 |
| 4 | 1.81436948 |
| 5 | 2.26796185 |
| 6 | 2.72155422 |
| 7 | 3.17514659 |
| 8 | 3.62873896 |
| 9 | 4.08233133 |
| 10 | 4.5359237 |
| 15 | 6.80388555 |
| 20 | 9.0718474 |
| 25 | 11.33980925 |
| 30 | 13.6077711 |
| 40 | 18.1436948 |
| 50 | 22.6796185 |
| 60 | 27.2155422 |
| 70 | 31.7514659 |
| 75 | 34.01942775 |
| 80 | 36.2873896 |
| 90 | 40.8233133 |
| 100 | 45.359237 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Kilograms to Pounds
| Kilograms (kg) | Pounds (lb) |
|---|---|
| 1 | ≈ 2.204623 |
| 2 | ≈ 4.409245 |
| 3 | ≈ 6.613868 |
| 4 | ≈ 8.81849 |
| 5 | ≈ 11.02311 |
| 6 | ≈ 13.22774 |
| 7 | ≈ 15.43236 |
| 8 | ≈ 17.63698 |
| 9 | ≈ 19.8416 |
| 10 | ≈ 22.04623 |
| 15 | ≈ 33.06934 |
| 20 | ≈ 44.09245 |
| 25 | ≈ 55.11557 |
| 30 | ≈ 66.13868 |
| 40 | ≈ 88.1849 |
| 50 | ≈ 110.2311 |
| 60 | ≈ 132.2774 |
| 70 | ≈ 154.3236 |
| 75 | ≈ 165.3467 |
| 80 | ≈ 176.3698 |
| 90 | ≈ 198.416 |
| 100 | ≈ 220.4623 |
Unit definitions
- Pounds lb
- Exactly 0.45359237 kilograms, by the 1959 international agreement.
- Kilograms kg
- The SI base unit of mass, defined through the Planck constant.
Questions people ask
Pounds to Kilograms: what is the conversion factor?
One lb is 0.45359237 kg.
How do I convert Pounds to Kilograms?
Use the formula above. For example, 100 lb = 45.359237 kg.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.