RC Ackermann Calculator

Compare your measured steering angles against true Ackermann geometry. Example values shown.

Geometry

Kingpin spacing is the distance between the steering pivot axes, not track width. Measure angles at full lock with a protractor or steering gauge.

INNEROUTER ▲ FRONT · LEFT TURN

Solid lines: your angles. Dashed: ideal outer angle.

Results

0% Ackermann
Ideal outer angle
Ideal inner − outer
Your inner − outer
Turn radius (rear axle center)

100% = true Ackermann. 0% = parallel steer. Negative = reverse (anti) Ackermann, where the outer wheel turns more. Many drift setups run near parallel or reverse at full lock because the car is sliding, not rolling through the turn.

Built for the track

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