Perimeter Calculators

The online perimeter calculator supports calculating the perimeter of circles, sectors, ellipses, triangles, squares, rectangles, quadrilaterals and other shapes, and displays the perimeter calculation formulas and schematic diagrams of the corresponding shapes.

Instructions for use
The online perimeter calculator calculates the perimeter of various shapes and displays the calculation formula for the perimeter of the corresponding shape.

Shape: Choose what shape's perimeter is calculated. This tool supports calculating the perimeter of circles, sectors, ellipses, triangles, squares, rectangles, parallelograms, quadrilaterals, trapezoids and other shapes, and displays schematic diagrams and formulas for calculating the perimeter of the corresponding shapes.
After selecting the corresponding shape, please enter the corresponding parameters as required. Click Calculate to get the corresponding circumference result. Please follow the parameter prompts and input the parameters correctly.
The calculated perimeter has no specific units, and the perimeter unit depends on the units of the input parameters.