Torque Calculator
Calculate torque from force and lever arm length. τ = F × r × sin(θ)
How to Calculate Torque
Enter Force Value
Input the force applied in Newtons (N). This is the push or pull acting on the lever arm.
Input Lever Arm Length
Enter the distance from the pivot point to where force is applied, measured in meters.
Get Instant Results
Click calculate to see torque in N·m and ft-lb, with the formula used for your calculation.
Key Features of This Torque Calculator
**Angle Support**
Optional angle input accounts for force applied at any angle, not just perpendicular (90°).
**Dual Unit Display**
Results shown in both Newton-meters (N·m) and foot-pounds (ft-lb) for international use.
**Physics-Accurate Formula**
Uses τ = F × r × sin(θ) for precise calculations matching engineering standards.
**Free & Instant**
No registration required. Get accurate torque calculations instantly in your browser.
Frequently Asked Questions
What is the formula for calculating torque?
Torque is calculated using τ = F × r × sin(θ), where F is force in Newtons, r is lever arm length in meters, and θ is the angle between force and lever arm. At 90°, sin(θ) = 1, simplifying to τ = F × r.
How do I convert Newton-meters to foot-pounds?
Multiply Newton-meters by 0.737562 to get foot-pounds. For example, 100 N·m equals approximately 73.76 ft-lb.
What angle gives maximum torque?
Maximum torque occurs at 90 degrees (perpendicular force). At 0° or 180°, torque is zero because the force is parallel to the lever arm.
Is torque the same as force?
No. Force is a push or pull (measured in Newtons), while torque is rotational force (measured in N·m). Torque depends on both force magnitude and where it's applied.
Why is torque important in engines?
Engine torque determines how much rotational force is available for acceleration and towing. Higher torque at low RPM means better pulling power and quicker acceleration from a stop.
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