Calculate rotational torque in Newton-metres, foot-pounds, and inch-pounds from a force and its perpendicular distance from the pivot (moment arm).
How it works
- Input the force applied (in Newtons or pounds).
- Enter the length of the moment arm or lever.
- Read the calculated torque across multiple standard measurement units.
Frequently asked questions
What is a moment arm?
The perpendicular distance from the pivot (rotation axis) to the line along which the force acts. A longer wrench gives more torque for the same force.
How do ft·lb and N·m relate?
1 ft·lb = 1.356 N·m. Bolt torque specs in the US are usually in ft·lb or in·lb; metric specs use N·m.
What is angular vs linear force?
A linear force applied at a distance creates torque. Torque is what makes things rotate — it is the rotational equivalent of force.