Force Converter
Convert force between newtons, kilonewtons, kilogram-force, pound-force and dynes.
How it works
The SI unit of force is the newton — the force that accelerates one kilogram at one metre per second squared. Everything here converts through it.
Kilogram-force and pound-force are the confusing ones, because they are forces named after masses. One kilogram-force is the weight of one kilogram under standard gravity, which is 9.80665 newtons. That is why a kitchen scale reading in kilograms is really measuring force and inferring mass.
The dyne is the CGS unit, one hundred-thousandth of a newton. It rarely appears in modern engineering but persists in some older physics literature.
The formula
N → lbf
lbf = N × 0.22480894
lbf → N
N = lbf ÷ 0.22480894
Any pair in this family
result = value × (factor of source ÷ factor of target)
Every unit is defined against the n, so any combination converts in one step.
Worked examples
| Scenario | Working | Result |
|---|---|---|
| 1 kgf to newtons | 1 × 9.80665 | 9.807 N |
| 100 N to pound-force | 100 ÷ 4.44822 | 22.48 lbf |
| A 70 kg person's weight | 70 × 9.80665 | 686.5 N |
When you'd use it
- Converting a load or tension rating between systems
- Working out weight as a force from a mass
- Reading a specification in kgf against one in newtons
- Physics and mechanical engineering coursework
Common questions
What is the difference between a kilogram and a kilogram-force?
A kilogram is mass; a kilogram-force is the weight of that mass under standard gravity, 9.80665 newtons. Scales blur the two because they measure force and display mass, which works only because gravity is near enough constant here.
How many newtons is one pound-force?
4.44822 N. Pound-force is the force gravity exerts on one pound of mass at standard gravity, which is why it converts through the same 9.80665 factor as kilogram-force does.
Why is force measured in newtons rather than kilograms?
Because force and mass are different quantities. The same mass weighs less on the Moon, but its mass is unchanged. Using newtons keeps the two separate, which matters as soon as gravity is not constant.
Is anything I enter sent anywhere?
No. Every conversion runs in your browser, so nothing you type is uploaded, logged or stored. There is no account and no record of what you converted.