Force Converter
Convert force between newtons, kilonewtons, kilogram-force, pound-force, ounce-force and dynes, with instant both-way results.
About the Force Converter
This force converter switches between the units engineers and physicists use: newtons, kilonewtons, kilogram-force, gram-force, pound-force, ounce-force and dynes. Enter a value, choose your units, and the result appears instantly with a reference table.
The newton is the SI unit — the force to accelerate one kilogram at one metre per second squared. Kilogram-force and pound-force express force as the weight of a mass under standard gravity (1 kgf = 9.80665 N, 1 lbf ≈ 4.448 N), which is why they're common in mechanical specifications and everyday contexts.
All conversions use exact factors through a newton base unit and run locally in your browser for fast, precise answers.
How to Use the Force Converter
- 1Enter the force value to convert.
- 2Select the source and target units.
- 3Read the result and reverse conversion instantly.
- 4Use the reference table for common values.
Frequently Asked Questions
How many newtons are in a kilogram-force?
One kilogram-force equals 9.80665 newtons, the weight of a 1 kg mass under standard gravity. So lifting a 10 kg object requires about 98 N of force. Kilogram-force is convenient because the number matches the mass in kilograms times g.
How do I convert pound-force to newtons?
Multiply pound-force by 4.4482216 to get newtons. So 100 lbf is about 445 N. Pound-force is the weight of a one-pound mass under standard gravity, and it's the everyday force unit in US engineering. This tool does the conversion both ways.
What is the difference between mass and force?
Mass (kg, lb) measures how much matter an object contains and never changes. Force (N, lbf) is mass times acceleration — weight is the force gravity exerts on a mass. Kilogram-force and pound-force blur the line by expressing force in mass-based units, valid only under standard gravity.
What is a dyne?
A dyne is the CGS unit of force: the force to accelerate one gram at one centimetre per second squared, equal to 10⁻⁵ newtons. It appears in older physics texts and some scientific contexts. This converter includes it for completeness.
Where is force conversion used?
Mechanical and structural engineering, physics problems, material testing (tensile and compressive strength), and product specs for actuators, springs and fasteners. Being able to move between newtons and pound-force is essential when working across metric and US datasheets.