How this calculator works
Pound-force and kilogram-force use standard gravity, 9.80665 m/s², as part of their definitions. A kilogram of mass is not itself a force measurement.
The formula
Target force = input × source newtons factor / target newtons factor.A quick example
1 kilogram-force equals 9.80665 newtons, and 1 pound-force equals 4.4482216152605 newtons.
How to use this calculator
- Choose the settings that match your scenario, using the units shown beside each field.
- Enter value, from, to.
- Calculate, then review the method and assumptions alongside the results.
A few common questions
Can I directly convert kilograms to newtons?
Only with an acceleration assumption. Kilogram-force is a defined force unit using standard gravity.
Does local gravity alter these unit definitions?
No. These conventional unit factors are fixed; the actual weight of a mass can vary with local gravity.
Reference: NIST: SI conversion factors