Calculate Torque from Force & Lever Arm Length

Torque Factors
Force (F) [?]
dynes (dyn) grams force (gf, pond) poundals (pdl) ounces force (ozf) newtons (N) pounds force (lbf) kilograms force (kgf) kilonewtons (kN) tons force (tonf, short, usa) tonnes force (tf, metric) tons force (tonf, long, uk)
Length (r) [?]
Select length unit millimetres (mm) centimetres (cm) inches (in) feet (ft) metres (m)
Calculate Torque
Torque (τ) [?]
dyn gf pdl ozf N lbf kgf kN tf (us) tf (metric) tf (uk) mm cm in ft m

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Related Tools

• Convert torque into different units
• Convert force into different units
• Convert length into different units

User Guide

This tool will calculate the torque generated around an axis by a force applied at right angle to a lever arm of a specified length.

Once you have selected the value and units for force and length, two conversion scales will be produced to show a range of torque values calculated for different values of force and length while the other parameter is kept fixed to the input value

Formula

This tool calculates torque using the following formula:

τ = F · r

Symbols

• τ = Torque
• F = Force
• r = Lever Arm Length

Force Applied

Enter the force applied perpendicular to the lever arm.

Lever Length

Enter the length of the lever arm between the point force is applied and the axis point.

Torque Calculation

This is the moment of force or turning force generated by a force applied at a specified distance from the axis of rotation.