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.
Everyday Calculators
Tile Calculator
Use this tile calculator to estimate how many tiles or boxes to buy before starting a floor, wall, bathroom, or backsplash project.
Last reviewed June 6, 2026Source note includedFree tool
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.
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 coverageUse square feet with tile dimensions in inches or square meters with tile dimensions in centimeters.
How to use
Steps
- Choose feet or meters for the project measurements.
- Enter the floor or wall area in square feet or square meters.
- Enter tile length and width in inches or centimeters.
- Add a waste allowance for cuts, breakage, and pattern matching.
- 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
These notes make the assumptions explicit, especially where the same search query can mean slightly different things.
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
Benchmarks
How to read the result
The calculator is a decision aid, not a fixed rule. Use the output to compare scenarios and document your assumptions. Benchmark ranges are broad planning heuristics unless this page names a specific source for the range.
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
The formula, inputs, example, and limitations are shown so the result is checkable, not just a number in a box.
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.
Last reviewed
June 6, 2026
Cite this page
Toolkit Shelf. Tile Calculator. Last reviewed June 6, 2026. 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.
Why might the real-world result differ?
Match the result to the task type: shopping tools depend on the same unit and usable quantity, home-project tools depend on field measurements and waste, date/time tools depend on counting rules, and conversion tools depend on the unit system.