Free Area Calculator - Calculate Area of Circle, Triangle, Rectangle & More

Calculate the area of geometric shapes instantly. Supports Square, Rectangle, Triangle, Circle, Trapezoid, and more.

Area Calculator

Select a shape and enter dimensions to calculate the area

Master Geometry Instantly

Stop memorizing complex formulas. Our Area Calculator is designed for precision and speed. Whether you're an architect, student, or DIY enthusiast, calculate the area of the 6 most common geometric shapes instantly.

Formulas & Cheat Sheet

Square
Area = a²
Rectangle
Area = w · h
Triangle
Area = ½ · b · h
Circle
Area = π · r²
Trapezoid
Area = ½(a+b) · h
Parallelogram
Area = b · h

How It Works

1

Select Shape

Choose from 6 geometric figures in the top grid.

2

Enter Values

Input dimensions like radius, width, or height.

3

Get Result

Instant calculation with one-click copy.