Calculate how many tiles you need for any floor or wall project. Enter your room dimensions and tile size to get the exact tile count, boxes needed, grout estimate, and total cost.
Room or surface dimensions
ft
ft
Select tile size — quick presets
Check product packaging
$
Mid-grade: $25–$80/box
Grout estimate
sq ft
Check bag (typ. 25 sq ft)
$
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tiles needed
Including 10% waste
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Boxes to buy
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Square footage
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Total tile cost
Room area—
Tile area (each)—
Tiles before waste—
Tiles with waste—
Boxes needed—
Grout bags needed—
Total estimated cost—
Frequently asked questions
How many 12×12 tiles do I need for 100 square feet? ›
A 12×12 inch tile covers exactly 1 square foot. For 100 sq ft with 10% waste, you need 110 tiles. If tiles come 10 per box, that's 11 boxes. Always buy full boxes — the extra tiles are essential for future repairs since discontinued tile patterns can be impossible to match.
How do I calculate tiles for a wall? ›
Measure the height and width of each wall section. Multiply to get square footage. Subtract openings (windows, doors, mirrors). Enter the total in the Length × Width fields — this calculator works identically for walls and floors. For bathroom shower walls, use 15% waste to account for the many cuts around fixtures.
How much grout do I need? ›
Grout coverage depends on tile size and grout joint width. Larger tiles with narrow joints need less grout per square foot than small mosaic tiles. A standard 25 lb bag of sanded grout covers about 25–50 sq ft depending on joint size and tile thickness. Our calculator estimates this automatically using your tile dimensions and joint width.
Should I use sanded or unsanded grout? ›
Use unsanded grout for joints 1/8 inch or smaller — on wall tile and polished stone where sand would scratch the surface. Use sanded grout for joints wider than 1/8 inch — on floor tile and most standard installations. The sand in sanded grout prevents shrinkage cracking in wider joints. Epoxy grout is available for both joint widths and provides superior stain resistance at higher cost.
How many tiles per box? ›
It varies by tile size. Small tiles (4×4, 6×6) typically come 15–20 per box. Standard 12×12 tiles come 10–15 per box. Large format tiles (18×18, 24×24) come 3–8 per box. The box will always list the number of tiles and total coverage in square feet — enter that coverage number directly if you know it, or count the tiles listed on the box.
About this tile calculator
This tile calculator accounts for grout joints in its tile count — a detail many calculators miss. The tile area with grout joint is used as the effective coverage per tile, giving a more accurate count especially for small tiles with wide joints. It also calculates grout bag requirements using your tile thickness and joint width.
Tips for buying tile
Always buy all tile for a project from the same dye lot. Tile color can vary slightly between production batches, which becomes visible after installation. Check the lot number printed on each box before purchasing. For large orders, a 10–15% excess ensures you'll have matching tile for future repairs — discontinued patterns can be impossible to source later.