Use this octagon calculator tool to quickly compute the area and perimeter of an octagon by just entering the length of a side.

## Octagon Calculator

### How to Use the Octagon Calculator

To use this octagon calculator, simply enter the length of a side of the octagon into the first field, and then click on the “Calculate” button. The calculator will compute and display the area and perimeter of the octagon.

### How the Calculator Works

The calculator uses the following formulas:

- Area (A) = 2 * (1 + √2) * sideLength
^{2} - Perimeter (P) = 8 * sideLength

It calculates the area by taking the length of the side, squaring it, and then multiplying by 2 * (1 + √2), which is a constant for octagons. The perimeter is calculated by multiplying the side length by 8.

### Limitations

This calculator assumes a regular octagon, where all sides and angles are equal. It does not account for irregular octagons. Ensure that you input a positive number for the side length. It may not accurately calculate very large or very small numbers due to limitations in JavaScript’s floating-point arithmetic.