Enter the internal friction angle of the material into the Earth Pressure Coefficient Calculator. The calculator will evaluate the Earth Pressure Coefficient.

## Earth Pressure Coefficient Formula

The following two example problems outline the steps and information needed to calculate the Earth Pressure Coefficient.

**EPC = 1- sin (fa)**

Variables:

- EPC is the Earth Pressure Coefficient ( )
- fa is the internal friction angle of the material

## How to Calculate Earth Pressure Coefficient?

The following steps outline how to calculate the Earth Pressure Coefficient.

- First, determine the internal friction angle of the material.
- Next, gather the formula from above = EPC = 1- sin (fa).
- Finally, calculate the Earth Pressure Coefficient.
- 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.

internal friction angle of the material = 45

EPC = 1- sin (fa)** **= ?