Perimeter Calculator

    Calculate perimeter, area, and diagonal of rectangles and squares

    Rectangle/Square Calculator

    Enter equal values for length and width to calculate a square

    About Perimeter Calculation

    The perimeter is the total distance around the edges of a shape. For rectangles and squares, it's calculated by adding all side lengths. This calculator also provides area, diagonal length, and aspect ratio information.

    •Formulas

    Rectangle Perimeter:P = 2(l + w)

    Rectangle Area:A = l × w

    Diagonal:d = √(l² + w²)

    •Features

    • –Calculate perimeter and area
    • –Compute diagonal length
    • –Determine if shape is a square
    • –Calculate aspect ratio
    • –High precision calculations

    •How to Use

    1. 1.Enter the length of your rectangle/square
    2. 2.Enter the width (same as length for squares)
    3. 3.Click "Calculate" to see comprehensive results
    4. 4.View perimeter, area, diagonal, and additional information