Enter the total vehicle weight (lbf) and the brake effort (lbf) into the calculator to determine the Brake Efficiency.

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## Brake Efficiency Formula

The following formula is used to calculate the Brake Efficiency.

**Ebrake = VW / BE * 100**

- Where Ebrake is the Brake Efficiency (%)
- VW is the total vehicle weight (lbf)
- BE is the brake effort (lbf)

## How to Calculate Brake Efficiency?

The following two example problems outline how to calculate the Brake Efficiency.

**Example Problem #1:**

- First, determine the total vehicle weight (lbf). In this example, the total vehicle weight (lbf) is given as 1500.
- Next, determine the brake effort (lbf). For this problem, the brake effort (lbf) is given as 399.
- Finally, calculate the Brake Efficiency using the equation above:

Ebrake = VW / BE * 100

Inserting the values from above and solving the equation:

Ebrake = 1500 / 399 * 100 = 375.95 (%)

**Example Problem #2: **

Using the same process as above, first define the variables required by the formula. In this case, these values are:

total vehicle weight (lbf) = 1600

brake effort (lbf) = 250

Entering these values yields:

Ebrake = 1600/ 250 * 100 = 6.4 (%)