Calculate torque from force and lever arm distance, solve for force or distance, and convert between torque and power using RPM. Supports N·m, lb-ft, and other units.
Angle between force and lever arm (90° for perpendicular)
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Torque (τ) measures rotational force around an axis. Our calculator helps you compute torque from force and lever arm distance, find the force needed for a given torque, or convert between torque and power for motors and engines.
Torque is the rotational equivalent of linear force. It measures how much a force causes an object to rotate around an axis. The SI unit is the newton-meter (N·m), while Imperial systems use pound-foot (lb-ft). Torque depends on three factors: the magnitude of the force, the distance from the axis (lever arm), and the angle between them.
Torque Formula
τ = r × F × sin(θ)Ensure bolts and screws are tightened to manufacturer specifications.
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Force causes linear acceleration (push/pull), while torque causes rotational acceleration (twist). Torque equals force multiplied by the perpendicular distance from the rotation axis. The same force creates more torque with a longer lever arm.