Tile Square Footage Calculator
Calculate tile square footage with the right waste factor for your pattern. Standard layouts need 10%, diagonals need 15%, and complex patterns like herringbone need 20%.
Tile Calculator
Choosing the right waste factor for tile
Tile waste depends on pattern complexity, room shape, and tile size. Standard grid patterns in a simple rectangular room need about 10%. Diagonal layouts need 15% because every edge tile is cut. Herringbone, basketweave, and chevron need 20% or more.
Larger tiles (24×24 and up) often need a higher waste factor — fewer cuts are reusable. Smaller tiles, especially mosaics, sometimes need less.
Counting tiles vs. counting square footage
When ordering, count both square footage AND number of tiles per box. A 12×24 tile gives you 2 sq ft per piece, so a 200 sq ft floor needs 100 tiles plus waste.
Always order at least one extra full box for future repairs. Tile is dye-lot sensitive — a year from now, the same SKU may not match your batch.
Tile size affects waste more than pattern
Tile waste varies dramatically by tile size, not just by installation pattern. Larger tiles waste more per cut because each cut sacrifices a bigger piece. Small mosaic tiles waste less because the offcuts can fit elsewhere.
12 × 12 inch tiles (and larger): 10% standard waste, 15% diagonal. Plan on at least 1 wasted tile per linear foot of cut. Large 24 × 48 inch porcelain tiles can waste 15-20% even on straight lay because each cut destroys a 4-8 sq ft piece.
6 × 6 inch tiles: 8% standard, 12% diagonal. Small enough that off-cuts often fit other corners.
Mosaic sheets (1-2 inch tiles on 12 × 12 mesh): 5-8%. The mesh allows custom cuts without losing many individual tiles.
Subway tile (3 × 6 inch): 10-12% with running bond, 15% with herringbone, 18% with chevron.
Grout, thinset, and the cost beyond the box
The tile cost on the box is only part of the story. A typical tile installation needs roughly these material allocations per square foot:
Tile: $1-30+ per sq ft (extreme range from basic ceramic to natural stone). Thinset mortar: $0.30-0.50 per sq ft (one 50 lb bag covers 40-90 sq ft depending on tile size). Grout: $0.15-0.30 per sq ft (depends on grout joint width — small joints use less). Sealer (for natural stone and grout): $0.10-0.25 per sq ft. Backer board for new installations: $0.75-1.50 per sq ft.
Add these together and a $5/sq ft tile becomes $6.50-7.00/sq ft in materials alone. Installation labor on top is typically $7-15/sq ft, bringing the all-in installed cost to $13-22 per sq ft.
Floor tile vs wall tile vs shower tile
Tile for different applications has different square footage requirements and different waste factors. The biggest variable is the cuts required at edges and around fixtures.
Floor tile (large rectangular rooms): 10% waste. Floor area only, no fixtures to cut around in most rooms.
Floor tile (bathroom with toilet, vanity, tub): 15% waste. Toilet flange, vanity footprint, and tub cut-outs each require additional cuts.
Wall tile (full bathroom walls): 12-15% waste. Window and door cuts plus fixture cuts add up.
Shower tile (3-wall surround): 15-20% waste. Niche cut-outs, valve plate cuts, soap dish positioning, and the curb add significant cutting.
Backsplash tile (kitchen): 15-25% waste. Outlet cuts, window sills, and the cabinet line all require precise cuts in highly visible areas. Order generously — the visible cuts in a backsplash mean you can't use scrappy off-cuts.
Pro tips
Save attic stock
Set aside 5 unused tiles for future repairs. Dye lots and product runs change.
Mosaic sheets count differently
Mosaic sheets are sold by the sheet, but each sheet covers about 1 sq ft. Order by sq ft and let the supplier calculate sheets.
Account for grout
Grout coverage depends on tile size and joint width. For standard 12×12 with 1/8" joints, one bag covers about 100 sq ft.
Buy from the same batch
Always specify "same dye lot" when ordering. Otherwise you risk getting two slightly different shades in your shipment.