Enter the actual width (in) and the angle of the armor (degrees) into the Effective Thickness Calculator. The calculator will evaluate the Effective Thickness.

## Effective Thickness Formula

The following two example problems outline the steps and information needed to calculate the Effective Thickness.

ET = W / sin(a)

Variables:

- ET is the Effective Thickness (in)
- W is the actual width (in)
- a is the angle of the armor (degrees)

To calculate the relative armor thickness, divide the actual width by the sine of the angle of the armor.

## How to Calculate Effective Thickness?

The following steps outline how to calculate the Effective Thickness.

- First, determine the actual width (in).
- Next, determine the angle of the armor (degrees).
- Next, gather the formula from above = ET = W / sin(a).
- Finally, calculate the Effective Thickness.
- After inserting the variables 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.

actual width (in) = 2.5

angle of the armor (degrees) = 30

ET = W / sin(a)** **= ?