Overview
What Is an Area Calculator?
This tool calculates the area of common geometric shapes including rectangles, triangles, and trapezoids.
Calculate area of common shapes instantly.
This tool calculates the area of common geometric shapes including rectangles, triangles, and trapezoids.
Useful for geometry homework, flooring estimates, and general area calculations.
Choose rectangle, triangle, or trapezoid.
Input the required measurements for your shape.
The result updates automatically.
Area = Length × Width
Area = (Base × Height) ÷ 2
Area = ((Base1 + Base2) ÷ 2) × Height
No, use our dedicated circle calculator for circular area.
The calculator is unit-agnostic - just ensure all your measurements use the same unit for a consistent result.
Break irregular shapes into rectangles, triangles, or trapezoids, calculate each separately, and add them together.
Yes, calculating room area is a common practical use for material estimation.
Yes, triangle height is measured perpendicular from the base to the opposite vertex.
No, calculations happen entirely in your browser.
Yes, completely free with no sign-up required.