The pound-force (a unit of force, not mass) and the newton (the SI unit of force) both have exact definitions.
How it works
Multiplying pounds-force by 4.4482216152605 gives newtons; dividing newtons by that same constant gives pounds-force back.
What this does not include
This does not include mass conversions — for converting a mass in pounds to kilograms, use this site’s lbs-to-kg calculator instead. This tool specifically converts force.
How to use this calculator
- Enter a value in either pounds-force or newtons — the other field fills in automatically.
Frequently asked questions
What’s the difference between pounds-mass and pounds-force?
Pounds-mass measures how much matter an object has; pounds-force measures the force gravity exerts on that mass — related but conceptually distinct quantities.
Where is this conversion commonly needed?
Engineering and physics calculations involving force, torque, or structural loads specified in different unit systems.
Is a newton a large or small amount of force?
Relatively small — one newton is roughly the force of gravity on a 100-gram object (about the weight of an apple).
