Area Calculator – Land, Circle, Triangle & Surface Area Measurement Tool

Measure area instantly with this free online calculator. Supports land, circle, triangle, carpet, and surface area calculations. Ideal for GPS mapping, construction, and academic use. Includes built-in formulas for accurate results—no downloads, mobile-friendly, and easy to use.

Area Calculator

Select Shape: Square Rectangle Triangle Circle Trapezoid Parallelogram Ellipse Hexagon

Dimension 1:

Dimension 2:

Dimension 3:

Theory and Equations

Select a shape to see its area equation and theory.