Force units used in SI, CGS, US customary and legacy engineering systems.
All factors come from the central conversion registry.
| Unit | Symbol | System | Definition |
|---|---|---|---|
| Newton | N | SI | 1 N = 1 kg·m/s² |
| Kilonewton | kN | SI | 1 kN = 1000 N |
| Dyne | dyn | CGS | 1 dyn = 10⁻⁵ N |
| Poundal | pdl | FPS | 1 pdl = exactly 0.138254954376 N |
| Ounce-force | ozf | US customary | 1 ozf ≈ 0.2780138509537812 N |
| Pound-force | lbf | US customary | 1 lbf = 4.4482216152605 N |
| Kilogram-force | kgf | Metric gravitational | 1 kgf = 9.80665 N |
| Sthene | sn | MTS historical | 1 sn = 1000 N |
| Kip-force | kip | US customary | 1 kip = 1000 lbf = 4448.2216152605 N |
| Meganewton | MN | SI | 1 MN = 10⁶ N |
Force is distinct from mass. The newton is the SI derived unit kg·m/s²; pound-force is a force unit and is therefore not interchangeable with pounds of mass.
The interactive calculator, reference table and indexed pair pages all read from the same conversion registry, so unit definitions and formulas stay synchronized.