Tile and Flooring Calculator
Short answer: Multiply the room's length by its width for square feet, add 10 percent for cuts and breakage (15 percent or more for diagonal or herringbone layouts), then divide by the coverage printed on one box and round up.
How is this calculated?
Measure each rectangle in the room and add them. The calculator adds your waste allowance, then rounds the box count up because stores sell whole boxes. Buy all boxes from the same lot or dye number so the color matches, and keep one spare box for future repairs.
Frequently asked questions
How much extra flooring should I buy?
Ten percent is the usual allowance for a straight layout. Use 15 percent for diagonal or herringbone patterns, and more for rooms with many corners or large-format tile.
How do I measure an L-shaped room?
Split it into two rectangles, measure each, and add the results. Enter the second rectangle in the extra area box.
Does the calculator work for vinyl plank and laminate?
Yes. Any product sold by the box with a square-foot coverage on the label works the same way.