Torque Calculator
τ = r × F × sin(θ). Rotational force = lever arm × applied force × angle.
Result
General calculation reads
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How to use this calculator
- Enter lever arm + force + angle.
- Read torque in N·m and lb-ft.
About this calculator
Torque (τ) is rotational force. τ = r × F × sin(θ) where r = lever arm, F = applied force, θ = angle between them. Maximum torque at θ = 90° (perpendicular). Wrench: longer lever = more torque for same hand force. Engine torque is at the crankshaft. Standard wheel-lug torque spec: 100-150 lb-ft for passenger cars; 350+ for heavy trucks. SI unit N·m; US engineering uses lb-ft.
Frequently asked
Why sin θ?+
Maximum torque?+
Why does longer wrench help?+
Engine torque vs. HP?+
Wheel torque spec?+
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