Perimeter Calculator

Perimeter Calculator

Calculate the perimeter for various shapes.

Choose a shape and enter the required dimensions.

Step 1: Select Shape & Enter Dimensions

Enter the length

Enter the width

Perimeter formulas used: $$\text{Rectangle: } 2(L+W),\quad \text{Square: } 4s, \quad \text{Triangle: } a+b+c,$$ $$\text{Circle: } 2\pi r,\quad \text{Regular Polygon: } n \times s.$$