Torque Calculator (Force × Lever Arm)
Works out the turning effect of a force.
Torque
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Part of the force doing the turning —
Effective lever arm —
The formula
τ = r × F × sin θ
A longer lever gives more torque from the same force, which is why a longer spanner helps.
What to watch out for
For an engine’s torque from power and rpm, use the horsepower and torque calculator.
Frequently Asked Questions
What torque does 100 N give on a 30 cm spanner?
30 N·m, or 22.1 lb·ft.
What about at 45°?
21.2 N·m.