Enter the perimeter of the base and the slant height into the calculator to determine the lateral area of the pyramid. This calculator can also evaluate any of the variables given the others are known.

## Pyramid Lateral Area Formula

The following formula is used to calculate the lateral area of a pyramid.

LA = 0.5 * P * s

Variables:

- LA is the lateral area of the pyramid (square units) P is the perimeter of the base (units) s is the slant height of the pyramid (units)

To calculate the lateral area of a pyramid, multiply the perimeter of the base by the slant height. Then, divide the result by 2.

## What is a Pyramid Lateral Area?

A pyramid’s lateral area is the total surface area of the pyramid excluding the base. It is calculated by adding up the areas of all the triangular faces on the sides of the pyramid. The formula to calculate the lateral area of a pyramid is 1/2 * perimeter of the base * slant height.

## How to Calculate Pyramid Lateral Area?

The following steps outline how to calculate the Lateral Area of a Pyramid.

- First, determine the perimeter of the base (P) in the given units.
- Next, determine the slant height of the pyramid (s) in the given units.
- Next, use the formula LA = 0.5 * P * s to calculate the lateral area of the pyramid.
- Finally, calculate the result by substituting the values of P and s into the formula.
- After calculating the lateral area, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

Perimeter of the base (P) = 20 units

Slant height of the pyramid (s) = 8 units