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Calculation Machine

Torque Calculator

Torque from force and lever arm, with unit conversion.

Reviewed by the Calculation Machine team · How we check our maths

Your values

ⓘ Live results

Results
Torque
100 N·m
Foot-pounds
73.7562
Inch-pounds
885.075
Kilogram-metres
10.1972

Working

  1. 1τ = 250 × 0.4 × sin(90°) = 100 N·m

Quick answer

Torque is force times the perpendicular lever arm distance; 1 N·m equals 0.7376 ft·lb.

The formula

τ = F × r × sin(θ)

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Force250 N
  • Lever arm0.4 m
  • Angle to lever90 °

Result

  • Torque100 N·m
  • Foot-pounds73.7562
  • Inch-pounds885.075
  • Kilogram-metres10.1972

How to use the Torque Calculator

  1. 1Enter the applied force in newtons.
  2. 2Enter the lever arm length in metres.
  3. 3Set the angle — 90° gives maximum torque.

Frequently asked questions

Why does angle matter?

Only the perpendicular component of force produces torque, so pulling at 30° gives half the torque of pulling square.

How do I convert N·m to ft·lb?

Multiply by 0.7376 — a 100 N·m wheel-nut spec is about 74 ft·lb.

About this calculator