Torque Calculator
Calculate torque from force, lever length and the angle of application.
Results update as you type.
About this calculator
Torque is the twisting force about a pivot: τ = F × r × sin(θ), where F is the applied force, r the distance from the pivot and θ the angle between them. Force applied at a right angle (θ = 90°) gives the maximum torque, τ = F × r, in newton-metres.
Frequently asked questions
What is the torque formula?
Torque equals force times lever length times the sine of the angle between them, τ = F × r × sin(θ). It is measured in newton-metres (N·m).
Why does the angle matter?
Only the component of force perpendicular to the lever produces rotation. At 90° all the force is effective; at 0° (straight along the arm) the torque is zero.
How do torque and power relate?
Mechanical power is torque times angular speed, P = τ × ω, where ω = rpm × 2π / 60. The same torque delivers more power the faster it spins.
Results are estimates for general guidance only, not financial, medical or tax advice.