Square Footage Calculator

Use it when your task matches one of these common needs: Find the area of a room, wall, garden bed, panel, or floor section. Multiply one section by quantity for repeated panels or rooms. It works best when you already know the length in feet, width in feet, and quantity of identical rectangles you want to total.

In plain language: The calculator multiplies length in feet by width in feet for one rectangle, then multiplies by quantity for repeated sections. The examples on the page are there so you can compare your inputs with a square footage example before copying the answer.

Length in feet: Use the longer side of one rectangle, converted to feet. For example, 9 ft 6 in becomes 9.5 feet. Width in feet: Use the other side of the same rectangle in feet. Keep length and width in the same unit before multiplying. Quantity: Use this for repeated equal rectangles, such as three panels. For different room sizes, calculate each rectangle separately and add the results. Square-foot result: This is area, not linear length. The page also shows square yards and square meters for comparison.

Read the headline answer, then check the supporting lines and examples to understand how the calculator got there. If one input changes, rerun the tool and compare the new answer instead of guessing.

For real material orders, add waste and account for openings, cuts, pattern matching, irregular shapes, stairs, and product coverage rules. Also check whether your measurements are in feet or inches, whether the shape needs to be split into rectangles, whether openings should be subtracted, and whether your material needs extra waste.

Multiply length in feet by width in feet. If the same rectangle repeats, multiply that area by quantity. A 12 ft by 10 ft room is 120 ft2 because 12 x 10 = 120.

Square feet measure area, such as a floor or wall surface. Linear feet measure one straight length. A 10 ft board is 10 linear feet, but a 10 ft by 4 ft panel covers 40 ft2.

Convert inches to decimal feet before entering the value. Divide inches by 12, then add the result to the feet. For example, 9 ft 6 in is 9.5 ft, and 10 ft 3 in is 10.25 ft.

Split the room into smaller rectangles, calculate each rectangle, and add the square footage together. For example, calculate the main room area, then calculate the nook or hallway area separately.

Use the full rectangle first, then subtract openings only when the project calls for it. Paint, wallpaper, drywall, and wall coverings often need opening adjustments, while flooring area usually starts with the floor footprint.

Use quantity only for identical repeated sections, such as two same-size walls, three plywood sheets, or four matching garden beds. If the sections are different sizes, calculate each one separately.

Yes, if the space is rectangular or can be split into rectangles. Use square footage as the measured area, then check the product coverage, overlap, irregular edges, and any material-specific calculator before ordering.

No. The result is the measured area. Material estimates usually need extra waste for cuts, damaged pieces, pattern matching, overlap, texture, product coverage, and openings.

One square yard is 9 ft2, so square yards equal square feet divided by 9. One square meter is about 10.7639 ft2, so square meters equal square feet divided by 10.7639.

Yes, square footage is a useful starting point for wallpaper, paint, flooring, and tile, but it is not the final buying number. Wallpaper still needs roll coverage, pattern repeat, openings, and waste percent, so use the Wallpaper Calculator after you know the wall area.

No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.