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Tile Calculator

Estimate floor or wall tile, including individual tile count, full boxes, setting material, grout, waste, and installation cost.

22-calculator project library Reviewed 2026-07-25Calculations run privately in your browser

Enter project details

Example values are prefilled
Surface and tile
ft
ft
in
in
%
Packaging and cost
sq ft
$
sq ft
$
sq ft
$
$
Location and tax assumptions

The location factor adjusts labor only. Replace all default prices with actual local quotes before purchasing.

A coarse planning adjustment—not a ZIP-code quote.

%

Enter the tax rate that applies to taxable materials.

All default prices are editable examples. Cost scenarios vary the entered plan; they do not represent bids or guarantees.

How to use this tile calculator

Estimate tile count, boxes, grout, thinset, waste, installation cost, and a shopping list.

Formula

Surface area = length × width. Order area = surface area × (1 + waste %). Tile count = order area ÷ tile face area, rounded up. Boxes, thinset, and grout are each rounded up to full packages.

Worked example

Example: A 12 × 10 ft floor is 120 sq ft. With 12% waste, plan for 134.4 sq ft. Fifteen-square-foot boxes require 9 boxes.

Accuracy and limitations

Tile spacing, pattern, niche details, room shape, tile caliber, and substrate preparation can materially change quantities.

Frequently asked questions

Does grout-joint width change tile count?

Usually only slightly for ordinary layouts, but it matters on mosaics and very large installations.

How much extra tile should I keep?

Keep several matching pieces or one unopened box when possible for future repairs.

Does this include backer board?

No. Backer board depends on substrate and local installation requirements.

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