Enter the actual output force (N), the effort force (N), and the mechanical advantage into the calculator to determine the Lever Efficiency.

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## Lever Efficiency Formula

The following formula is used to calculate the Lever Efficiency.

**Elever = OF / (EF * MA) * 100**

- Where Elever is the Lever Efficiency (%)
- OF is the actual output force (N)
- EF is the effort force (N)
- MA is the mechanical advantage

## How to Calculate Lever Efficiency?

The following example problems outline how to calculate the Lever Efficiency.

**Example Problem #1**

- First, determine the actual output force (N). In this example, the actual output force (N) is given as 50 .
- Next, determine the effort force (N). For this problem, the effort force (N) is given as 25 .
- Next, determine the mechanical advantage. In this case, the mechanical advantage is found to be 3.5.
- Finally, calculate the Lever Efficiency using the formula above:

Elever = OF / (EF * MA) * 100

Inserting the values from above and solving yields:

Elever = 50 / (25*3.5) * 100 = 57.14 (%)

**Example Problem #2**

Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as:

actual output force (N) = 60

effort force (N) = 13

mechanical advantage = 5

Entering these given values yields:

Elever = 60 / (13 * 5) * 100 = 92.307** **(%)