Definition: A pound-force is a unit of force in the Imperial system, defined as the force exerted by gravity on a mass of one pound at the Earth's surface.
History/origin: Commonly used in the United States and other countries using Imperial units.
Current use: Pound-force is widely used in engineering and everyday measurements in Imperial unit countries.
Definition: A newton is the SI unit of force, defined as the force required to accelerate one kilogram of mass by one meter per second squared.
History/origin: Named after Sir Isaac Newton for his work in classical mechanics.
Current use: Newtons are the standard unit of force used globally in physics and engineering.
| Pounds-Force (lbf) | Newtons (N) |
|---|---|
| 1.000 | 4.448 |
| 5.000 | 22.241 |
| 10.000 | 44.482 |
| 20.000 | 88.964 |
| 50.000 | 222.411 |
| 75.000 | 333.617 |
| 100.000 | 444.822 |
| 0.500 | 2.224 |
| 2.500 | 11.121 |
| 123.400 | 548.910 |
1 pound-force ≈ 4.44822 newtons
Example: convert 22.4809 pounds-force to newtons:
22.4809 ÷ 0.224809 = 100 newtons