Area Calculator

Find the area of rectangles, circles, triangles, trapezoids and ellipses.

ShapeLength / radius / base / base 1 / semi-axis aWidth / height / base 2 / semi-axis bHeight (trapezoid)

How the Area Calculator works

Odd-shaped rooms and lots are easiest handled by splitting them into rectangles and triangles, calculating each, then adding. Nothing more complicated is usually needed.