Convert Pounds-force to Kilograms-force
1 pound-force (lbf) equals 0.45359237 kilograms-force (kgf).
1 lbf = 0.45359237 kgf
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound-force to kilogram-force converter to paste a column from Excel.
How to Convert Pound-force to Kilogram-force
- 1 lbf = 0.45359237 kgf
- 1 kgf = 2.204622622 lbf
- Example: convert 15 lbf to kgf: 15 lbf = 15 × 0.45359237 kgf = 6.80388555 kgf
Formula
kgf = lbf × 0.45359237
or kgf = lbf ÷ 2.204622621849
Derivation from SI units:
- 1 lbf = 0.45359237 kg × 9.80665 m/s² = 4.4482216152605 N
- 1 kgf = 1 kg × 9.80665 m/s² = 9.80665 N (exact)
- 1 lbf = 4.448221615261 N ÷ 9.80665 N per kgf = 0.45359237 kgf
Both units are defined exactly, so the factor is exact. Pound-force definition: pound-force; Kilogram-force definition: kilogram-force.
Worked examples
- 100 lbf is 45.359237 kgf.
100 lbf × 0.45359237 = 45.359237 kgf - 10 lbf is 4.5359237 kgf.
10 lbf × 0.45359237 = 4.5359237 kgf
Pound-force to Kilogram-force conversion table
| Pounds-force (lbf) | Kilograms-force (kgf) |
|---|---|
| 1 lbf | 0.45359237 kgf |
| 5 lbf | 2.26796185 kgf |
| 10 lbf | 4.5359237 kgf |
| 25 lbf | 11.33980925 kgf |
| 50 lbf | 22.6796185 kgf |
| 100 lbf | 45.359237 kgf |
| 200 lbf | 90.718474 kgf |
| 500 lbf | 226.796185 kgf |
| 1000 lbf | 453.59237 kgf |
| 5000 lbf | 2267.96185 kgf |
| 10000 lbf | 4535.9237 kgf |
Where it's used
Pound-force and kilogram-force are both gravitational force units; their ratio equals the pound-to-kilogram ratio, 0.45359237.
Pound-force to other force units
| Conversion | 1 lbf equals |
|---|---|
| pound-force to newton | 4.448221615 N |
| pound-force to kilonewton | 0.004448221615 kN |
| pound-force to kilogram-force | 0.45359237 kgf |
| pound-force to kip | 0.001 kip |
| pound-force to dyne | 444822.1615 dyn |
| pound-force to ounce-force | 16 ozf |
| pound-force to gram-force | 453.59237 gf |
Frequently asked questions
How many kgf is 1 lbf?
Exactly 0.45359237 kgf.
How many kilograms-force are in 1 pound-force?
1 lbf = 0.45359237 kgf.
How do I convert pounds-force to kilograms-force?
Multiply the value in lbf by 0.45359237, or divide it by 2.204622622. For example, 15 lbf × 0.45359237 = 6.80388555 kgf.
Is the lbf to kgf conversion exact?
Yes. Both units are defined exactly, and 1 lbf is exactly 0.45359237 kgf.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound-force (lbf)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kilogram-force (kgf)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Pounds-force to Kilograms-force. Retrieved October 17, 2026, from https://scientificconverters.com/force/pound-force-to-kilogram-force/
IEEE
Scientific Converters, "Convert Pounds-force to Kilograms-force," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/force/pound-force-to-kilogram-force/