Power, Torque & Speed
Radius from Torque and Force Calculator
Enter torque and tangential force to solve for the ideal effective radius at which that force would act.
Inputs
Formula
Effective radius from torque and force
Worked example
Using the default values shown in the calculator, the same formula gives the following result. This is a quick sanity check for the calculation, not a design recommendation.
Inputs
- Torque
- 50 N*m
- Tangential force
- 500 N
Result
- Effective radius
- 100 mm
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Technical references for this calculation
Frequently asked questions
Is the result a diameter or a radius?
It is a radius. Double it if you need the corresponding ideal effective diameter.
Can this size a drum directly?
Use it as an ideal geometry calculation. Real drum sizing can also depend on efficiency, rope layers, safety factors, bending limits, and available standard dimensions.