The pound-force
The pound-force (lbf) equals exactly 4.4482216152605 newtons — the force exerted by standard gravity on a one-pound mass. It is the standard force unit in US engineering, aerospace thrust ratings, and mechanical specifications.
Pound-force to Kilogram-force Converter
1 lbf = 0.453592 kgf (pound-force → kilogram-force)
1 lbf = 0.453592 kgf
1 pound-force equals 0.453592 kilogram-force. To convert pound-force to kilogram-force, multiply the pound-force value by 0.453592. For quick reference: 1 lbf = 0.453592 kgf, 5 lbf = 2.26796 kgf, 10 lbf = 4.53592 kgf, 100 lbf = 45.3592 kgf.
Formula
Kilogram-force = Pound-force × 0.453592Quick
How to convert pound-force to kilogram-force
Take your value
Start with your value in pound-force.
Multiply by 0.453592
Multiply the pound-force value by 0.453592. This is the exact conversion factor from pound-force to kilogram-force.
Read the result
The product is your value in kilogram-force. For example, 5 lbf × 0.453592 = 2.26796 kgf.
Conversion formula
The exact factor from pound-force to kilogram-force is 0.453592.
Kilogram-force = Pound-force × 0.453592
Pound-force to Kilogram-force conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Pound-force (lbf) | Kilogram-force (kgf) |
|---|---|
| 0.1 lbf | 0.045359 kgf |
| 0.25 lbf | 0.1134 kgf |
| 0.5 lbf | 0.2268 kgf |
| 1 lbf | 0.45359 kgf |
| 2 lbf | 0.90718 kgf |
| 3 lbf | 1.3608 kgf |
| 4 lbf | 1.8144 kgf |
| 5 lbf | 2.268 kgf |
| 6 lbf | 2.7216 kgf |
| 7 lbf | 3.1751 kgf |
| 8 lbf | 3.6287 kgf |
| 9 lbf | 4.0823 kgf |
| 10 lbf | 4.5359 kgf |
| 11 lbf | 4.9895 kgf |
| 12 lbf | 5.4431 kgf |
| 13 lbf | 5.8967 kgf |
| 14 lbf | 6.3503 kgf |
| 15 lbf | 6.8039 kgf |
| 16 lbf | 7.2575 kgf |
| 18 lbf | 8.1647 kgf |
| 20 lbf | 9.0718 kgf |
| 22 lbf | 9.979 kgf |
| 24 lbf | 10.886 kgf |
| 25 lbf | 11.34 kgf |
| 28 lbf | 12.701 kgf |
| 30 lbf | 13.608 kgf |
| 32 lbf | 14.515 kgf |
| 36 lbf | 16.329 kgf |
| 40 lbf | 18.144 kgf |
| 45 lbf | 20.412 kgf |
| 48 lbf | 21.772 kgf |
| 50 lbf | 22.68 kgf |
| 60 lbf | 27.216 kgf |
| 70 lbf | 31.751 kgf |
| 75 lbf | 34.019 kgf |
| 80 lbf | 36.287 kgf |
| 90 lbf | 40.823 kgf |
| 100 lbf | 45.359 kgf |
| 125 lbf | 56.699 kgf |
| 150 lbf | 68.039 kgf |
| 200 lbf | 90.718 kgf |
| 250 lbf | 113.4 kgf |
| 300 lbf | 136.08 kgf |
| 400 lbf | 181.44 kgf |
| 500 lbf | 226.8 kgf |
| 600 lbf | 272.16 kgf |
| 750 lbf | 340.19 kgf |
| 800 lbf | 362.87 kgf |
| 900 lbf | 408.23 kgf |
| 1000 lbf | 453.59 kgf |
Real-world reference
A commercial jet engine can produce over 70,000 lbf of thrust. A typical adult grip strength is around 90–110 lbf. In kilogram-force, that gives you: 1 lbf = 0.453592 kgf, 10 lbf = 4.53592 kgf, 100 lbf = 45.3592 kgf.
Frequently asked questions
- How many kilogram-force are in 1 pound-force?
- 1 pound-force equals 0.453592 kilogram-force.
- How do I convert pound-force to kilogram-force?
- Multiply the pound-force value by 0.453592. So x lbf × 0.453592 = the equivalent in kgf.
- What is 5 pound-force in kilogram-force?
- 5 pound-force equals 2.26796 kilogram-force.
- What is 10 pound-force in kilogram-force?
- 10 pound-force equals 4.53592 kilogram-force.
- What is 100 pound-force in kilogram-force?
- 100 pound-force equals 45.3592 kilogram-force.
- How do I convert back from kilogram-force to pound-force?
- Multiply the kilogram-force value by 2.20462. For example, 1 kgf = 2.20462 lbf.
- Is the pound-force bigger than the kilogram-force?
- No. 1 pound-force is smaller than 1 kilogram-force. It takes 2.20462 pound-force to equal 1 kilogram-force.
- Are these conversion factors exact?
- The factor is derived directly from the SI definitions of pound-force and kilogram-force; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.
About the pound-force and the kilogram-force
The kilogram-force
The kilogram-force (kgf), also called the kilopond (kp), equals exactly 9.80665 newtons — the force exerted by standard gravity on a one-kilogram mass. It remains common on older European spring scales, some tension gauges, and bicycle spoke-tension specs.