Tile Calculator

Tile calculation requires accounting for more than just the floor area — the waste factor, box coverage, and the importance of buying enough from the same production lot are all critical to a successful tile project. Running short and needing to order more mid-project almost guarantees a visible difference in tile color or shade.

Dye lots and why they matter: tile is manufactured in batches. Even the same model number can have subtle color or texture variation between production runs. For this reason, always: buy all tiles for a project at once from the same retailer, check that all boxes have the same lot number printed on the label, and buy one extra box beyond your calculation and save it for future repairs.

Setting material calculations: tile purchase covers only the tile itself. A complete tile installation also requires: thinset mortar (coverage varies; one 50 lb bag covers 40–60 sq ft for standard tile), grout (coverage depends on tile size and joint width), cement board or backer board for walls and wet areas, waterproofing membrane for showers, tile spacers, and sealant for natural stone or grout joints.

Tile selection by application: Porcelain: extremely dense, low water absorption (under 0.5%), suitable for floors, walls, and wet areas. Can be installed indoors and outdoors. Ceramic: slightly more porous than porcelain, lower cost, excellent for wall applications and low-traffic floors. Natural stone (marble, travertine, slate): beautiful but requires sealing, more maintenance-intensive, and more expensive. Glass tile: exclusively for walls — too slippery and fragile for floors.

PEI rating for floor tile: the Porcelain Enamel Institute (PEI) rating indicates wear resistance. PEI 0: wall use only. PEI 1–2: residential light traffic. PEI 3: residential and light commercial. PEI 4–5: heavy commercial and exterior use. Never use PEI 0–1 tile on floors — it will crack or scratch.