What is the lever arm?

It is the distance from the pivot or axis to the point where the force acts, before angle adjustment.

Can I calculate torque in lb ft?

Yes. The calculator supports common imperial torque units such as lb ft and lbf in.

No. Use manufacturer specifications and calibrated tools for critical fasteners.

Calculate torque, force, lever arm distance or force angle with metric and imperial torque units.

What to calculate

Find torque Find force Find lever arm From power and rpm

Force

Lever arm (distance from axis)

Angle between force and lever arm, degrees

Torque is highest at a right angle. At 0° or 180°, there is no rotating effect.

Quick scenarios

Torque

Uses force 100 N, lever arm 0.3 m, and angle 90°: result 30 N·m.

in N·m

in kgf·m

3.059

in kgf·cm

305.9

in lb-ft

22.127

Comparable to: ~ 🔧 M14 spark plug (25 N·m)

Torque vs angle at fixed force and lever arm

Pull the wrench at a right angle to the lever arm to avoid losing torque.

Torque search results expect a solver for force, lever arm distance, angle and torque with both metric and imperial units.

τ = r F sin θ

tau is torque, r lever arm, F force and theta the angle between them.

At 90 degrees the force is perpendicular and torque is maximized; at 0 degrees it produces no turning effect.

Same units, different meaning

Torque and work can both use N m, but torque describes rotational effect about an axis, not energy transferred over a path.

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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