Read the result
The torque vector is perpendicular to the plane containing r and F. Its magnitude grows with force and lever arm.
Engineering applications
Torque / Moment Calculator
Calculate the moment of a force as r x F and read its turning effect.
Formula
tau = r x F
Result
Worked substitution
Torque measures the turning effect of a force about a point.
Where it helps
Use it for turning effects about a point, shaft, hinge, or origin in mechanics problems.
Common slip
A force along the line from the pivot produces no turning effect, even if the force is large.
Try it
Keep the force fixed and double the lever arm. The torque magnitude should double.