A sq ft calculator converts your measurements into square feet so you can plan home projects, compare spaces or order materials. Type in the length and width, in feet, inches, yards or meters, and it gives you the area instantly. It’s the quickest way to answer questions like “How much carpet do I need?” or “How big is this apartment really?”
The basic formula is length × width = square feet. A deck that’s 16 by 20 feet is 320 sq ft. If you measured in inches, multiply the inches together and divide by 144, since there are 144 square inches in a square foot. If you measured in meters, multiply by 10.764 to convert square meters to square feet. For yards, multiply square yards by 9.
Example: a bedroom measures 11 feet 6 inches by 13 feet 3 inches. Convert to decimals: 11.5 × 13.25 = 152.4 sq ft. If you’re buying laminate sold in boxes of 20 sq ft, you’ll need 8 boxes, plus one extra for waste and cuts.
Tips: sketch the space on paper and label each measurement, split odd shapes into rectangles and triangles, and add 5 to 15 percent extra for materials depending on how many cuts you’ll make. Diagonal tile layouts and patterned carpet need more extra material than simple layouts.
Why use an online Sq Ft Calculator: it saves time, avoids simple arithmetic mistakes and shows each step, so you can check your homework, plan a project or make a decision with confidence. Bookmark the page so it’s ready the next time you need it.
Tips for getting accurate results from the Sq Ft Calculator: double-check that every input uses the right units, enter numbers without commas or symbols, and run the calculation a second time with a quick estimate in your head to confirm the answer looks reasonable.
Learn more about square feet and conversions on Wikipedia’s square foot article. For related project tools, like mulch, yardage and wallpaper calculators, visit Minedit.