Enter the diameter of the pier into the calculator to determine the size of the sides and the thickness of the pier.

## Pier Footing Size Formula

The following formula is used to calculate the pier foot size.

S = D * 2

T = D * 1.1

- Where S is the sides of the footing (in)
- T is the thickness of the footing (in)
- D is the diameter of the footing (in)

## What is a pier footing?

Definition:

A pier footing is a square piece of construction that is used as a base support for the creating of a pier. The size of the footing depends on the diameter of the pier beams.

## How to calaculate pier footing size?

Example Problem:

The following example outlines how to calculate a pier footing size.

First, determine the diameter of the pier beams. In this example, the diameter is 20 inches.

Next, determine the thickness of the footing using the formula above:

T = D * 1.1

T = 20 * 1.1

T = 22 inches thick

Finally, calculate the length of the sides of the square footing using the formula:

S = D * 2

S = 20 * 2

S = 40 inches