Enter a room or area's length and width to get the square footage, square yards, and the total cost at your price per square foot.
For non-rectangular areas, split the space into rectangles, calculate each, and add them up. Estimate only.
Square footage is simply length times width for a rectangle. For flooring, paint, tile, or landscaping, it's the starting number every material estimate builds on — measure in feet, multiply, and you have the area.
Square feet = length (ft) × width (ft) · Square yards = square feet ÷ 9
Break it into rectangles, find each area, and add them. Do the same for bump-outs and closets.
Carpet and some materials are sold by the square yard — there are 9 square feet in a square yard.
Related: flooring calculator · tile calculator · cost per square foot calculator · all free calculators.
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Browse all 300+ free calculators →Yes. The Square Footage Calculator is completely free, runs in your browser, and never asks for a signup, email, or download. Enter your numbers and the result updates instantly.
It uses standard formulas and recalculates the moment you change a value, so the math is exact for the inputs you enter. Treat the result as a reliable planning estimate; for decisions with legal or tax consequences, confirm the figures with a qualified professional.
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Last reviewed: September 2026. Free to use, no signup — Square Footage Calculator by ToolWise Digital.
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