Pounds to Kilograms Converter
Enter a weight in pounds (lb), then click calculate to get the value in kilograms (kg).
How to convert pounds to kilos
Converting pounds to kilograms is simple once you know the conversion factor: 1 pound = 0.45359237 kilograms.
To convert pounds to kilos, multiply the number of pounds by 0.45359237. Example:
- 150 lb × 0.45359237 = 68.0388555 kg
- Rounded to 2 decimals: 68.04 kg
Quick reference table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.454 |
| 5 | 2.268 |
| 10 | 4.536 |
| 25 | 11.340 |
| 50 | 22.680 |
| 100 | 45.359 |
| 150 | 68.039 |
| 200 | 90.718 |
Why this conversion matters
Pounds are commonly used in the United States, while kilograms are used in most other countries and in scientific settings. If you track body weight, shipping weight, gym progress, or recipe portions, converting between lb and kg helps avoid confusion and mistakes.
Common uses
- Fitness: Track body mass and lifting goals in metric units.
- Travel: Understand luggage limits in kilograms.
- Medical: Many medical charts and dosage references use kg.
- Shipping: International couriers often require kg values.
Frequently asked questions
Is 1 lb exactly 0.45 kg?
Not exactly. It is close, but the precise value is 0.45359237 kg. For rough estimates, 0.45 works, but for accuracy use the full factor.
How do I convert kg back to pounds?
Divide kilograms by 0.45359237, or multiply by 2.20462262.
Can I convert decimal pounds?
Yes. This calculator accepts whole numbers and decimals, such as 0.5 lb, 123.75 lb, or 201.2 lb.
Summary
Use the calculator above for instant, accurate lb-to-kg conversion. The formula is straightforward, but using a calculator prevents rounding errors and saves time.