Tile Calculator
Calculate how many tiles, boxes, and sq ft of tile needed for floors, walls, and backsplashes.
Results
How to Calculate Tile
Measure floor or wall area in square feet. Determine how many tiles fit per square foot based on tile size. Multiply by waste factor and divide by tiles per box to get boxes needed.
Frequently Asked Questions
How much tile waste should I plan for?
10% for straight grid layouts. 15% for diagonal layouts. 20% for complex patterns or rooms with many cuts. Irregularly shaped rooms may need up to 25%.
How many tiles per square foot?
12x12 tiles: 1 per sq ft. 6x6: 4 per sq ft. 18x18: 0.44 per sq ft. 24x24: 0.25 per sq ft. 3x6 subway: 8 per sq ft.
How much does tile cost?
Ceramic tile: $1-$5/sq ft. Porcelain: $3-$10/sq ft. Natural stone: $5-$30/sq ft. Installation typically adds $5-$15/sq ft including mortar, grout, and labor.
How many extra tiles should I buy?
Buy 10% extra for straight layouts, 15% for diagonal. Keep leftover tiles for future repairs — matching tiles can be discontinued. Larger tiles require more waste because cuts leave bigger unusable pieces.
How do I calculate tile for walls vs floors?
For walls, measure height x width of each wall section. For floors, measure length x width. Add all sections together for total area. Subtract areas you won't tile (behind vanities, inside shower niches) but include a waste factor.