Rectangle Calculator

Calculate area, perimeter, and diagonal length of a rectangle given width and height.

A = w \times h, \quad P = 2(w + h), \quad d = \sqrt{w^2 + h^2}

Result

Step-by-Step Calculation & Explanation

A rectangle is a four-sided polygon with four right angles. Its area is the product of width and height. Its perimeter is the sum of all sides. The diagonal is calculated using the Pythagorean theorem.