Pounds-force to kilograms-force
Multiply pounds-force by 0.453592 to get kilograms-force.
50 lbf = 22.6796 kgf
How to convert pounds-force to kilograms-force
The kilogram-force is the force of one kilogram under standard gravity, exactly 9.80665 N. The pound-force is the force of one pound under standard gravity, exactly 4.4482216152605 N.
Worked example — 50 lbf: 50 × 0.453592 = 22.6796 kgf.
Pounds-force to kilograms-force table
| Pounds-force | Kilograms-force |
|---|---|
| 1 lbf | 0.453592 kgf |
| 5 lbf | 2.268 kgf |
| 10 lbf | 4.5359 kgf |
| 25 lbf | 11.3398 kgf |
| 50 lbf | 22.6796 kgf |
| 100 lbf | 45.3592 kgf |
| 200 lbf | 90.7185 kgf |
| 500 lbf | 226.7962 kgf |
| 1,000 lbf | 453.5924 kgf |
Reverse and related
About pounds-force and kilograms-force
Pound-force (lbf)
1 lbf = 0.453592 kgfDefinition. The force of one pound under standard gravity, exactly 4.4482216152605 N
History and origin
The pound-force is the weight of one pound of mass under standard gravity, a natural force unit in the imperial system. It equals about 4.448 newtons.
Current use
Pounds-force are used in US engineering and to quote thrust, such as a rocket engine rating.
Source: NIST SP 811, App. B (force). lbf and kgf are exact via the pound/kilogram and standard gravity 9.80665 m/s² (CGPM 1901); SP 811 prints them rounded
Kilogram-force (kgf)
1 kgf = 2.2046 lbfDefinition. The force of one kilogram under standard gravity, exactly 9.80665 N
History and origin
The kilogram-force, also called the kilopond, is the weight of one kilogram under standard gravity, exactly 9.80665 newtons. It was common before the newton became standard.
Current use
Kilograms-force still appear in some engineering and in torque specifications outside the United States.
Source: NIST SP 811, App. B (force). lbf and kgf are exact via the pound/kilogram and standard gravity 9.80665 m/s² (CGPM 1901); SP 811 prints them rounded
Where people use this
Pounds-force: US engineering, thrust ratings. Kilograms-force: engineering outside the US, torque specs. 1 lbf is about 0.454 kgf.
Every value is carried to full double precision; the display is rounded.
Both units are defined in NIST SP 811, App. B (force). lbf and kgf are exact via the pound/kilogram and standard gravity 9.80665 m/s² (CGPM 1901); SP 811 prints them rounded.
Questions people ask
How many kgf is 1 lbf?
One pound-force is about 0.454 kgf.
How many lbf in a kgf?
One kilogram-force is about 2.205 lbf.
How many kgf is 100 lbf?
100 lbf is about 45.4 kgf.