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Tile Calculator

Use this tile calculator to estimate how many tiles or boxes to buy before starting a floor, wall, bathroom, or backsplash project.

Method and assumptions documentedFree toolSource note included

Live calculator

Tile

Tile to buy132 sq ft

132 sq ft / 12.3 sq m including 10% waste.

Estimated tiles132

1 sq ft per tile.

Boxes needed9

Rounded up from 16 sq ft per box.

Material cost$462.00

Area with waste multiplied by price per sq ft.

Material estimates need field measurements and a waste allowance. Supplier coverage, cuts, breakage, compaction, and local installation requirements can change the order quantity.

Quick answer

Tile Calculator: what it calculates

Tile Calculator estimates tile count, box count, waste, and material cost from project area, tile size, box coverage, and price per square foot.

ResultTile needed
InputsSquare feet or square meters, Tile size, Waste percent, Box coverage, Price per area
FormulaTile calculator formula

Formula

Tile calculator formula

Tiles = area x (1 + waste percent) / tile area; boxes = area with waste / box coverage

Use square feet with tile dimensions in inches or square meters with tile dimensions in centimeters.

How to use

Steps

  1. Choose feet or meters for the project measurements.
  2. Enter the floor or wall area in square feet or square meters.
  3. Enter tile length and width in inches or centimeters.
  4. Add a waste allowance for cuts, breakage, and pattern matching.
  5. Enter box coverage and price per square foot or square meter to estimate boxes and cost.

Example

Sample calculation

Area120 sq ft / 11.15 sq m
Waste10%
12 in / 30.48 cm square tile132 tiles
16 sq ft / 1.49 sq m boxes9 boxes

Calculator use

Best for

  • Estimating tile count, box count, waste, and material cost for floors, walls, bathrooms, and backsplashes.
  • Comparing tile sizes after converting tile dimensions from inches to square feet.
  • Adding waste for cuts, breakage, layout patterns, edges, niches, and future replacement tiles.
  • Checking tile material quantity before pricing grout, thinset, backer board, trim, and labor separately.

Before relying on it

Check first

  • Forgetting that diagonal layouts, patterns, small rooms, and many edges usually increase waste.
  • Using tile count without checking box coverage, lot numbers, dye lots, or extra repair stock.
  • Treating the result as a full installation plan that includes substrate, waterproofing, grout, thinset, or code details.
  • Comparing tile products without checking thickness, finish, slip rating, outdoor suitability, or wall versus floor use.

Details

What to know before using the result

Tile areaInches or centimeters

A 12 by 12 inch tile covers 1 square foot. Its 30.48 by 30.48 centimeter equivalent covers about 0.093 square meters.

Waste bufferCuts and breakage

Straight layouts may need less waste than diagonal patterns, complex rooms, or fragile tile.

Box roundingRound up

Boxes are rounded up because tile is usually sold by full box, and extra tile helps with repairs.

Source notes

References used for this calculator

NISTLists square foot as an area unit and provides common U.S. customary conversion factors.

Benchmarks

How to read the result

5% - 10%: Simple layout waste.

Useful for square rooms and straight patterns with limited cuts.

10% - 15%: Common planning range.

Often safer for bathrooms, walls, and rooms with more cuts.

15%+: Complex layout.

Consider more waste for diagonals, patterns, niches, stairs, or fragile tile.

Calculator accuracy

Methodology and assumptions

Formula

Tiles = area x (1 + waste percent) / tile area; boxes = area with waste / box coverage

Inputs used

Square feet or square meters, Tile size, Waste percent, Box coverage, Price per area

Limitations

Home-material calculators estimate quantity and cost from visible dimensions and coverage assumptions. They do not replace field measurement, installer guidance, structural design, permits, or code review.

Review record

Catalog QA baseline on June 6, 2026. This date marks the catalog-wide automated and editorial QA baseline, not a tool-specific expert review.

Cite this page

Toolkit Shelf. Tile Calculator. https://toolkitshelf.com/tools/tile-calculator

FAQ

Common questions

How do I calculate how much tile I need?

Estimate the area in square feet or square meters, add a waste allowance, then divide by the area of one tile or by box coverage.

How much extra tile should I buy?

Many projects add 10% or more for cuts, breakage, layout matching, and future repairs.

Does this include grout or thinset?

No. This calculator estimates tile quantity and material cost only. Grout, thinset, underlayment, trim, and labor are separate.

Why should I add a material buffer?

Cuts, waste, damaged pieces, uneven surfaces, pattern matching, delivery limits, and field measurements can all make the exact calculated amount too low.

Can this replace a contractor quote?

No. Use it for planning quantities and budgets. Labor, permits, code, site conditions, disposal, access, and contractor scope can change the real project cost.