Force Converter
Convert Newton, pound-force, kilogram-force, and dyne.
Unit
Force Converter
Generated on April 24, 2026
?What is the Force Converter?
A force converter translates between the SI newton, the imperial pound-force, the engineering kilogram-force (the weight of 1 kg under Earth's gravity), and the CGS dyne used in some scientific contexts. Force is what causes mass to accelerate — 1 newton is the force needed to accelerate 1 kg at 1 m/s². In everyday life, when you 'weigh' something in kilograms you are actually measuring mass, not force; the corresponding force (weight) is the mass multiplied by 9.81 m/s² (Earth's gravity).
The Formula
The newton (N) is the SI unit: 1 N accelerates 1 kg at 1 m/s². Kilogram-force (kgf) is the weight of 1 kg under standard Earth gravity (9.80665 m/s²) — older engineering disciplines still use it because it matches everyday intuition about how heavy something feels. The dyne is the CGS unit (1 g × 1 cm/s²), now mostly restricted to chemistry and surface tension measurements. Pound-force is the imperial equivalent to kgf but based on pound-mass and gravitational feet-per-second².
Practical Examples
A 70 kg person's weight is 686.5 N on Earth — the downward force they exert while standing still.
1 kilonewton equals about 101.97 kgf, or 224.8 lbf — a common range for structural connections.
100 pound-force equals 444.8 newtons — a useful conversion for US-spec fasteners and hardware.
A medium apple held in your hand exerts approximately 1 newton downward — a handy mental reference for the unit.
SpaceX Falcon 9 first stage produces about 7,607 kN of sea-level thrust — equivalent to roughly 1,700,000 pounds of force.
The force from a car crash at 60 km/h peaks around 50 kN over a few milliseconds — 50 times a driver's body weight.