Force Unit Converter

Load cells, tension specs and weighing systems quote newtons on one datasheet, pounds-force on another and kilogram-force on a third, while dynes appear in old laboratory work. This converter moves exactly between them with no approximation.

Convert force unit units

Value

From

Why force units collide

Force mixes the SI newton with two mass-derived units — the pound-force (lbf) and the kilogram-force (kgf) — plus the tiny dyne of old cgs work. The kgf assumes standard gravity (9.80665 m/s²), so 1 kgf = 9.80665 N exactly; the lbf is 4.4482216152605 N.

All factors are exact definitions, so the converter is exact. The only trap is kgf vs kg: kgf is a force (mass × standard gravity), not a mass, and must not be read as kilograms in a load calc.

Which unit where

Newtons and kilonewtons are the SI language of load cells and structural ratings; lbf dominates US load and tension specs; kgf appears on older scales and Asian equipment; dynes are legacy laboratory force. Match the unit your spec writes in, then convert.

Complete conversion reference

Convert 1 unit to	N	kN	lbf	kgf	dyn
1 N	1	0.001	0.224809	0.101972	100000
1 kN	1000	1	224.809	101.972	1e+08
1 lbf	4.44822	0.00444822	1	0.453592	444822
1 kgf	9.80665	0.00980665	2.20462	1	980665
1 dyn	1e-05	1e-08	2.24809e-06	1.01972e-06	1

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Frequently asked

How many newtons in a pound-force?

Exactly 4.4482216152605 N. One kilogram-force is 9.80665 N (mass × standard gravity). The converter keeps lbf, kgf and N so you can compare load ratings directly.

Is kgf the same as kg?

No. kgf is a force (1 kg × 9.80665 m/s² ≈ 9.80665 N), not a mass. Reading a kgf load as kilograms in a calculation is a common and serious error; convert through newtons instead.

What is a dyne in newtons?

One dyne is exactly 1×10⁻⁵ N (the cgs force unit). It appears in legacy laboratory data; convert to newtons for any modern SI calculation.

Why do load cells use N but scales use kgf?

SI load cells state newtons or kilonewtons; many scales and Asian equipment quote kgf. Convert at the interface so a tension or weighing limit is not silently off by the gravity factor.

This page performs exact unit arithmetic with no physical assumption beyond the stated reference (for example mH₂O assumes water near 4 °C, and pH follows its logarithmic definition). It is a working aid, not a substitute for the measurement method named in your permit.