An area calculator finds the area of rectangles, squares, circles and triangles. The area of a 10 ft × 12 ft room is 120 square feet.
An area calculator finds the area of rectangles, squares, circles and triangles. The area of a 10 ft × 12 ft room is 120 square feet. Our area calculator is built on the same core calculate area square feet calculator rectangle area calculator and is trusted by students, professionals and everyday users who need a fast, accurate result. Because every calculation runs locally in your browser, there is no waiting, no sign-up and no limit on how often you use it.
Geometric Area Formulas Supported
Calculate area for rectangles (L × W), circles (πr²), triangles (½bh), trapezoids (½(a+b)h), and ellipses with instant metric/imperial unit conversions.
Square Footage for Home Projects
Quickly calculate room square footage for hardwood flooring, carpet installation, wallpaper, and garden landscaping materials.
Unit Conversions for Area
Convert smoothly between square feet, square meters, square yards, acres, and hectares with verified conversion constants.
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100% Free, Instant & Private. All computations run directly in your browser sandbox without sending personal data to any external server.