Tile Calculator

Running out of tile mid-job is worse than it sounds: dye lots vary, and a box bought two months later may not match the floor you've already laid. This calculator converts your room dimensions into tiles and boxes with a proper waste allowance built in — 10% is the standard for straight-lay patterns, and 15% or more is wise for diagonal or herringbone layouts, rooms with many cuts, or natural stone with breakage. Pick your tile size (from small 6-inch squares to large-format 12×24s and plank tiles), enter the coverage per box from the carton label, and the calculator returns the tile count, box count, and square footage to buy. It also estimates cost two ways: materials at your price per square foot, and a professionally installed range covering tile, setting materials, and labor at 2026 national averages. Installed tile pricing varies enormously with the tile itself, the substrate work needed, and the pattern — intricate layouts and small tiles cost more to set — so treat the installed range as a budgeting anchor and get itemized bids for the real number.

Area = length × width, increased by the waste allowance to cover cuts, breakage, and future repairs — 10% is standard for straight-lay floors, while diagonal and herringbone patterns, small or irregular rooms, and brittle natural stone justify 15% or more. Tile count divides the waste-adjusted area by the face area of your chosen tile (a 12×24 tile covers 2 sq ft, a 6×6 covers 0.25 sq ft, and so on); box count divides by the coverage printed on the carton and rounds up, since retailers sell full boxes. Buying to the box count — not the raw tile count — automatically leaves a few spares, which matter because manufacturers vary dye lots and a later purchase may not match. Material cost multiplies waste-adjusted area by your entered price. The installed range applies $8–15 per square foot of measured area, spanning mid-grade tile with standard setting work at 2026 national averages; substrate repairs, waterproofing (required in showers), tile removal, and premium stone push real quotes above the band, and simple backsplash-size jobs often price by the job rather than the foot.