Torque Calculator
Torque from force and lever arm length.
Enter your values
ⓘ Live results
Results
- Torque
- 28 N·m
- Torque
- 20.65 ft·lb
Quick answer
Torque = F x r x sin(theta).
tau = F r sin(theta)
How to use the Torque Calculator
- 1Enter the applied force and the length of the lever arm.
- 2Enter the angle between the force and the lever arm (90 degrees is most effective).
- 3Read the resulting torque.
Worked example
Using the values the calculator loads with:
Inputs
- Force80 N
- Lever arm length0.35 m
- Angle to lever arm90 degrees
Results
- Torque28 N·m
- Torque20.65 ft·lb
Frequently asked questions
Why is angle 90 degrees usually used?
Torque is maximised when the force is perpendicular to the lever arm.
How does this relate to a wrench?
A longer wrench (bigger lever arm) produces more torque for the same hand force.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.