Square Footage Calculator

Multiply the length by the width of each space in feet, then add the rooms together. For a 10 by 12 foot room that is 120 square feet.

Yes. Pick your unit and the calculator converts each dimension to feet first, so a 144 by 108 inch room correctly comes out to 108 square feet. The conversion factors are 12 inches per foot, 3.28084 feet per meter and 3 feet per yard.

Add a row with '+ Add space' for each room and enter its length and width. The tool sums every space, and the running per-room total appears next to each row so you get one combined square footage figure.

One square meter is about 10.76 square feet, and one square foot is about 0.0929 square meters (the exact factor the tool uses is 0.092903). The result shows square feet, square meters and square yards side by side.

Split it into rectangles, enter each part as its own row, and the calculator adds the pieces into a single total square footage. A bay or alcove becomes an extra small rectangle you tack on the same way.

Yes. Every area is rounded to two decimal places. A 4 by 5 meter room, for instance, converts to 215.28 square feet rather than a long decimal, and the per-room and total figures use the same two-place rounding.

The calculator multiplies length by width, so it handles rectangles and squares directly. For a triangle work out half of base times height, and for a circle use pi times the radius squared, then treat that value as a separate area you add by hand.

No. This tool measures flat floor area only. It does not add wall or ceiling surface, and it does not subtract wall thickness. Whether closets count toward living area depends on the standard you are following, so measure the space you actually want to total.

Yes. The calculation runs entirely in your browser and nothing you type is sent to a server, so your measurements stay on your device.