Enter the force required for the brake disc to close on the wheel and the brake pedal ratio into the calculator to determine the brake pedal force.

Brake Pedal Force Formula

The following equation is used to calculate the Brake Pedal Force.

BPF = BDF / BPR
• Where BPF is the brake pedal force (lb-f)
• BDF is the brake disc force on the wheel (lb-f)
• BPR is the brake pedal ratio

To calculate the brake pedal force, divide the brake disc force by the brake pedal ratio.

What is a Brake Pedal Force?

Definition:

The brake pedal force is the amount measured in pounds or kilograms required for a driver to press the brake pedal to stop their vehicle.

For example, if you were driving a car and your brake pedal force was 50 pounds, you would need to apply at least 50 pounds of pressure on your brake pedal to bring your vehicle to a stop.

How to Calculate Brake Pedal Force?

Example Problem:

The following example outlines the steps and information needed to calculate the Brake Pedal Force.

First, determine the brake disc force. In this example, the brake disc needs to exert a force of 600 lb-f on the wheel to brake properly.

Next, determine the brake pedal ratio. In this case, the brake pedal ratio is measured to be 8:1.

Finally, calculate the brake pedal force using the formula above:

BPF = BDF / BPR

BPF = 600 / 8

BPF = 75 lb-f