Enter the total force applied to pulley (N) and the weight lifted by pulley (N) into the calculator to determine the Pulley Efficiency.

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## Pulley Efficiency Formula

The following formula is used to calculate the Pulley Efficiency.

Epull = WL / AF * 100

- Where Epull is the Pulley Efficiency (%)
- AF is the total force applied to pulley (N)
- WL is the weight lifted by pulley (N)

To calculate the efficiency of a pulley, divide the weight lifted by the force applied, then multiply by 100.

## How to Calculate Pulley Efficiency?

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

**Example Problem #1:**

- First, determine the total force applied to pulley (N). In this example, the total force applied to pulley (N) is given as 20.
- Next, determine the weight lifted by pulley (N). For this problem, the weight lifted by pulley (N) is given as 30.
- Finally, calculate the Pulley Efficiency using the equation above:

Epull = WL / AF * 100

Inserting the values from above and solving the equation:

Epull = 30 / 20 * 100 = 150 (%)

**Example Problem #2: **

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

total force applied to pulley (N) = 50

weight lifted by pulley (N) = 100

Entering these values yields:

Epull = 100 / 50 * 100 = 200 (%)