Square Footage Calculator

Calculate area for rectangles, triangles, circles, and trapezoids. Add multiple rooms.

$
Enter cost per sq ft to estimate total project cost.
120 sq ft
ft
ft
Total Area
120sq ft

11.15 sq meters

Documentation

How It Works

Select a shape for each room or area, enter the dimensions, and the calculator will compute the area in square feet and square meters. You can add multiple rooms to get a total.

Optionally enter a price per square foot to estimate project costs for flooring, painting, or other per-area materials.

Area Formulas

Rectangle: L × W

Triangle: ½ × B × H

Circle: π × r²

Trapezoid: ½ × (B₁ + B₂) × H

Last Updated: February 28, 2026

Frequently Asked Questions
How to Use

About the Square Footage Calculator

What it calculates

This square footage calculator computes engineering and applied physics quantities for circuits, fluids, and mechanical systems. Calculate area for rectangles, triangles, circles, and more.

When to use it

Use for coursework, lab estimates, and quick technical calculations.

Example

Adjust the inputs above to model your specific scenario with the Square Footage Calculator.

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