📐Area Calculator

Calculate the area of common 2D shapes including rectangles, circles, triangles, and more.

Width

Height

Area (w × h) =—

About Area Calculator

Calculate the area of any common 2D shape — square, rectangle, circle, triangle, parallelogram, trapezoid, ellipse, sector, and regular polygon. Enter the required dimensions and get the area instantly with the formula used shown for reference.

How to Use Area Calculator

1
Select a shape
Choose the 2D shape you want to calculate the area for from the shape picker.
2
Enter dimensions
Fill in the required measurements (e.g. base and height for a triangle).
3
View the result
The area is calculated instantly with the formula displayed for reference.

Common Use Cases

Calculating room area for flooring or painting estimates
Solving geometry homework problems
Determining plot area for landscaping or construction
Computing surface areas for material estimation

Frequently Asked Questions

Which shapes are supported?

Square, rectangle, circle, triangle, parallelogram, trapezoid, rhombus, ellipse, sector, and regular polygon. Select the shape and the required input fields appear automatically.

What units can I use?

Enter any consistent unit (mm, cm, m, inches, feet) — the calculator is unit-agnostic and the result is in the square of whatever unit you input.