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Square Footage Calculator

Free square footage calculator supporting rectangles, circles, triangles, trapezoids, and custom shapes. Calculate room areas, estimate paint and flooring costs with waste factors. View results in square feet, square meters, acres, and hectares. Perfect for home improvement and real estate.

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How to Use Square Footage Calculator

  1. 1Select a shape (rectangle, circle, triangle, etc.).
  2. 2Enter the dimensions in your preferred unit.
  3. 3View the area with automatic unit conversions.
  4. 4Use the cost estimator for flooring or paint projects.

Frequently Asked Questions

For a rectangle, multiply length × width. For example, a 12ft × 15ft room = 180 sq ft.

Measure each room's square footage and add 10% for waste and cuts. The calculator does this automatically.

Use the formula: Area = π × radius². Enter the radius or diameter and the calculator handles the math.

The Square Footage Calculator is a free online tool that lets you calculate area for rectangles, circles, triangles, and rooms with cost estimates. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.

Yes, the Square Footage Calculator is 100% free to use with no limitations. There is no registration required, no daily usage caps, and no hidden fees. You can use it as many times as you need.

The Square Footage Calculator uses industry-standard formulas and algorithms to deliver reliable results. While the tool is designed for accuracy, results should be used as estimates and guidance. For critical decisions, always consult a qualified professional.

Yes, after running your calculation you can copy the results to your clipboard or take a screenshot. The Square Footage Calculator displays a detailed breakdown so you can easily record or share your numbers. No account is required to use or save results.

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About Square Footage Calculator

Free square footage calculator supporting rectangles, circles, triangles, trapezoids, and custom shapes. Calculate room areas, estimate paint and flooring costs with waste factors. View results in square feet, square meters, acres, and hectares. Perfect for home improvement and real estate.

NexTool's Square Footage Calculator is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.

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Area Formulas Reference
Rectangle
A = length x width
Circle
A = pi x r²
Triangle
A = 0.5 x base x height
Trapezoid
A = 0.5 x (a + b) x h
Heron's formula for triangles with three sides: s = (a+b+c)/2, then A = sqrt(s(s-a)(s-b)(s-c))