Ackermann Steering Calculator

Inputs

Wheelbase (L)

Distance between front and rear axle centers.

Front track width (T)

Distance between front tire centerlines.

Inside steer angle (delta_i)

Inside front wheel steer angle.

Actual outside angle (delta_o)

Measured or designed outside front wheel angle at the same steering position.

Default result

Ackermann

87.8%

Pass

Also computed

Ideal outside angle23.34°

Outside angle error0.66°

Center turn radius5.467m

Method notes 2 notes

Ackermann percentage compares cot(outside) - cot(inside) against track / wheelbase at one steering position.
Real tire slip angles, compliance, caster, steering-axis inclination and bump steer can move the preferred geometry away from pure Ackermann.