Automotive / Brakes

Brake Bias Calculator

Estimate theoretical front and rear brake torque distribution from hydraulic geometry.

Calipers and rotors

Front effective piston areaRear effective piston areaFront rotor effective radiusRear rotor effective radius

Optional master cylinders

Front master-cylinder boreEnter both bores or leave both blank.Rear master-cylinder bore

Theoretical torque bias

Front brake bias64.36%

35.64% rear

Front torque share: 64.356%
Rear torque share: 35.644%
Front : rear torque ratio: 1.8056 : 1
Master-cylinder correction: Not applied — equal line pressure

Theoretical result only. It assumes equal pad friction and, without master bores, equal circuit pressure. With two master bores it assumes equal input force; pedal balance-bar position, proportioning valves, tyre grip, weight transfer, temperature and dynamic behaviour are excluded.