Ackermann Steering Calculator
SI
Imp
Imperial
Inputs
View results
Wheelbase
(L)
Distance between front and rear axle centers.
in
Front track width
(T)
Distance between front tire centerlines.
in
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.
°
Results
Default result
Edit inputs
Ackermann
87.8
%
Pass
Also computed
Ideal outside angle
23.34
°
Outside angle error
Pass
0.66
°
Center turn radius
17.93
ft
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.
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