Force converter
Convert newtons, kilogram-force, pound-force and the other units engineers use to express load.
Converter
Quick pairs
tap to loadOne newton in every force unit
15 rows| Unit | Symbol | 1 N equals |
|---|---|---|
| Kilonewton | kN | 0.001 |
| Meganewton | MN | 1e-6 |
| Millinewton | mN | 1,000 |
| Micronewton | µN | 1,000,000 |
| Dyne | dyn | 100,000 |
| Kilogram-force | kgf | 0.1019716213 |
| Gram-force | gf | 101.9716213 |
| Tonne-force (metric) | tf | 0.0001019716213 |
| Pound-force | lbf | 0.2248089431 |
| Ounce-force | ozf | 3.59694309 |
| Kip-force | kipf | 0.0002248089431 |
| Ton-force (short) | tonf | 0.0001124044715 |
| Ton-force (long) | tonf uk | 0.0001003611353 |
| Poundal | pdl | 7.233013851 |
| Joule per meter | J/m | 1 |
How the newton to pound-force conversion works
The newton, the force needed to accelerate a 1 kg mass at 1 m/s², is the SI reference unit for force, and every other unit here is pinned to it. A kilonewton is 1,000 N, a dyne is a tiny 0.00001 N, and a kilogram-force — the force exerted by one kilogram of mass under standard Earth gravity — is 9.80665 N.
The default pairing is newton to pound-force. Multiply by 0.2248089431 to go from newton to pound-force:
lbf = N × 0.2248089431
Reverse it by multiplying by 4.448221615, the same as dividing by 0.2248089431. A torque spec calling for 50 N of clamping force needs 50 × 0.2248089431 = 11.24 lbf, and a US spring rated at 100 lbf exerts 100 × 4.448221615 = 444.82 N.
Force units are mostly the language of engineers rather than everyday speech, but they're everywhere behind the scenes: structural engineers rate beams, cables, and bolted joints in newtons or kilonewtons; US automotive and tool specifications still use pound-force for torque and clamping loads; rocketry and jet propulsion report engine thrust in kilonewtons internationally or pound-force in the US; and materials testing labs use dynes for very small forces at a lab-bench scale.
The most persistent source of confusion in this category is the difference between mass and force, which colloquial speech blurs constantly. A kilogram is a unit of mass, not force — but “kilogram-force” (kgf) is a real, separate unit equal to the weight of one kilogram under standard gravity (9.80665 N), and it's easy to see “kg” used loosely on scales or spec sheets to mean kgf. A second, rarer trap is the poundal, a force unit built to pair naturally with pound-mass rather than pound-force; it's roughly 32 times smaller than the pound-force (0.1383 N versus 4.448 N) and shows up almost exclusively in older US engineering texts.
Questions
How many pound-force are in one newton?
One newton equals 0.2248089431 lbf. The reverse figure, 1 lbf = 4.448221615 N, is the one commonly used to convert US torque or load specs into metric engineering units.
Which units does this force converter cover?
16 units in total, referenced to the newton: the metric ladder (micronewton through meganewton), the dyne (a CGS unit), gravity-based force units (gram-force, kilogram-force, tonne-force), imperial/US units (pound-force, ounce-force, kip-force, ton-force short and long, poundal), and the joule-per-meter equivalent.
Does rounding matter in force conversions?
For most mechanical or DIY work, rounding to two or three decimal places is fine. In structural or aerospace engineering, where safety margins are calculated from these numbers, it's standard practice to carry the full precision through the calculation and only round the final reported value.
When would I use kilogram-force instead of newtons?
Kilogram-force is common on older or non-SI-standardized equipment and spec sheets, especially in parts of Europe and Asia, where torque wrenches or pressure gauges were historically calibrated against a hanging mass rather than a pure SI force unit. Newtons are the standard everywhere in modern scientific and most engineering work.
Is 'kilogram-force' the same as just 'a kilogram'?
No, even though they're often used as if they were. A kilogram is a unit of mass; kilogram-force is the force that gravity exerts on a one-kilogram mass at Earth's surface (9.80665 N). The distinction barely matters in daily conversation but matters a great deal in physics, where mass and force are fundamentally different quantities with different units.
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