Science
Torque Calculator
Use the torque calculator for rotational force problems when the force acts perpendicular to the lever arm.
Choose the missing quantity; the calculator hides that field and solves it from the others.
Solved value
—
- Torque
- —
- Force
- —
- Lever arm
- —
Student quick launch
Grade planning, algebra checks, and formulas students reach for most.
Study path
Use this calculator with
Follow these when you want the formula behind the answer, a short lesson, or nearby tools in the same topic.
What the torque calculator solves
Use the torque calculator for rotational force problems when the force acts perpendicular to the lever arm.
Formula
How to use it
- Choose the quantity you want to solve for.
- Enter the known values with consistent units.
- Check the rearranged formula, substitution, and warnings before using the result.
How to read the answer
A longer lever arm produces more torque for the same perpendicular force.
Common mistakes and edge cases
- If force is not perpendicular, multiply by sin(theta).
- Use meters for the lever arm.
- Torque direction depends on rotation direction.
Worked examples
Solve the main formula
Solved value
Torque = 40 N m
Reverse-solve a missing input
Solved value
Force = 180 N
Frequently asked questions
Can the torque calculator solve for a missing variable?+
Yes. Use the solve-for control to hide the missing value, then enter the other known values with compatible units.
Why do the units matter?+
Formula calculators assume the entered values are already in matching units. Convert first when your measurements use mixed systems.
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Last updated: May 15, 2026