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Tile Calculator

Tile Calculator

Estimate how many tiles you need for a floor or wall, including grout gap and waste.

ft
ft
in
in
in
%

Results appear as you type.

How to use

  1. Enter the area to tile in feet.
  2. Enter tile size in inches and grout gap.
  3. Add waste for cuts (10% floors, 15%+ diagonals).

Formula

areaSqIn = (areaL×12) × (areaW×12)
tilePitchL = tileL + grout
tilePitchW = tileW + grout
tiles = ceil(areaSqIn / (tilePitchL × tilePitchW) × (1 + waste%/100))

Examples

Example 1

10×8 ft with 12×12 in tiles, 1/8 in grout, 10% waste ≈ 94 tiles.

Example 2

Same area with 6×6 in tiles needs roughly four times as many.

Assumptions

  • Grout is included in the pitch so layout spacing matches installed size.
  • Does not model pattern layouts (herringbone) which need extra waste.

FAQ

How do I account for grout?

Enter grout width so the tool uses the tile's installed footprint, not just the tile face.

How much waste is typical?

About 10% for simple layouts. Diagonals and busy patterns often need 15% or more.

Should I round up boxes?

Yes. Buy whole boxes and keep a few spares for repairs.

Can I mix tile sizes?

Run the calculator once per size, then add the counts.

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