Convert brake pad mm to percentage: enter the current pad thickness to get the % left of a new pad, usable life before replacement and a wear chart.

Measure the friction material only, at its thinnest point.

Friction material only, not the steel backing plate.

Typical new car pad is 10โ€“12 mm of friction material; 12 mm is assumed. Enter your pad’s spec if you know it.

Replacement point and second pad
3 mm is a common replace-now point; many makers list 2 mm as the minimum.

Optional. The thinner of the two readings is used.

Related Calculators

Brake Pad Percentage Formula

The following formula is used to calculate the percentage remaining of a brake pad.

P = (Tc / Tแตข) ร— 100

Variables:

  • P is the percentage remaining
  • Ti is the initial thickness of the brake pad in millimeters
  • Tc is the current thickness of the brake pad in millimeters

To calculate the percentage remaining of a brake pad, divide the current thickness by the initial thickness and multiply the result by 100.

What is a Brake Pad?

A brake pad is a crucial component of a vehicle's braking system. It is a flat piece of material that presses against the brake rotor to create friction, which slows down or stops the vehicle. Brake pads are typically made from materials such as ceramic, metallic, or organic compounds, each offering different performance characteristics. Over time, brake pads wear down due to the friction generated during braking, and they need to be replaced to ensure the vehicle's braking system remains effective and safe.

How to Calculate Brake Pad Percentage?

The following steps outline how to calculate the Brake Pad Percentage.

  1. First, measure the initial thickness of the brake pad (Ti).
  2. Next, measure the current thickness of the brake pad (Tc).
  3. Next, calculate the percentage remaining using the formula P = (Tc / Ti) * 100.
  4. Finally, calculate the Brake Pad Percentage.
  5. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Initial Thickness (Ti) = 10 mm

Current Thickness (Tc) = 7 mm