Pounds to kilograms (lb to kg)
Type a value in pounds and get the result in kilograms instantly — with the exact factor, a step-by-step formula and a table of common values.
Sources: NIST — Guide to the SI, Appendix B.9 (conversion factors by kind of quantity: mass)
The number you want to convert.
Your result
Fill in the fields above to see your result.
How to convert pounds to kilograms
To convert pounds to kilograms, multiply the value by 0.4535924.
Example: 150 lb × 0.4535924 = 68.0389 kg.
Pounds to kilograms conversion table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 100 | 45.3592 |
| 110 | 49.8952 |
| 120 | 54.4311 |
| 130 | 58.967 |
| 140 | 63.5029 |
| 150 | 68.0389 |
| 160 | 72.5748 |
| 180 | 81.6466 |
| 200 | 90.7185 |
| 220 | 99.7903 |
| 250 | 113.398 |
Related conversions
When you need pounds in kilograms
Frequently asked questions
How many kilograms is 150 lb?
150 lb is 68.0389 kg. That’s a frequently quoted figure because 150 lb sits near a typical adult body-weight reading on US scales.
Is converting pounds to kilograms just dividing by 2?
No — dividing by 2.20462 gives the exact result, not dividing by 2. Halving a pound figure overstates the kilogram value by about 10%, which is large enough to matter for dosing, luggage limits or any weight-sensitive comparison.