Floors calculator

Tile CalculatorTiles & Square Feet Needed

Calculate tile quantity, square footage and waste for floors or walls. Enter project size and tile dimensions to estimate how many pieces you should buy.

Updated August 20, 2026

✓Instant estimateNo sign-up required

✓Clear formulaSee how the result is built

✓Practical unitsBoxes, bags, sheets or volume

✓Editable wasteAdjust for your project

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Project details

Enter your measurements and material details.

Planning estimate only. Actual quantities vary with cuts, layout, site conditions and product specifications.

💡Tip:

Large-format tile and diagonal layouts can create more unusable offcuts than a simple grid.

How the Tile Calculator works

This tile calculator combines the project area with the physical size of each tile to estimate the minimum piece count. The waste setting is important because tile installations always involve edge cuts, broken pieces and pieces that cannot be reused elsewhere in the layout.

Formula

Project area = length × width. Area with waste = project area × (1 + waste %). Tile count = area with waste ÷ area of one tile.

Measure before you buy

Measure the actual tiled surface, not the overall room when cabinets, tubs or other permanent fixtures will remain uncovered. For walls, calculate each wall separately. When a pattern includes two or more tile sizes, calculate each format according to the pattern ratio instead of treating the whole job as a single tile size.

Large-format tile and diagonal layouts can create more unusable offcuts than a simple grid.
Natural stone may justify extra material so pieces with undesirable color or defects can be set aside.
Keep several full tiles after installation for future repairs because exact dye lots may disappear.

Common questions

Is 10% waste enough for tile?

It is often adequate for simple square layouts, while diagonal, patterned or cut-heavy rooms may need 12–20%.

Does grout spacing change the count?

Slightly. For ordinary grout joints the difference is small, so this calculator uses nominal tile size.

Should I tile under cabinets?

That depends on the installation plan. Only include areas that will actually receive tile.

Can I calculate wall tile?

Yes. Enter the wall width as length and wall height as width, then repeat for additional walls.

Why should I keep spare tiles?

Matching replacement tile can be difficult to source years later, especially when dye lots or product lines change.

Worked example: Tile Calculator

Using the example inputs shown in the calculator — Project length (ft) = 12, Project width (ft) = 10, Tile width (in) = 12, Tile length (in) = 24, Waste allowance (%) = 12 — the result is 68 tiles. This demonstrates the formula with a complete set of numbers rather than a hidden assumption.

The result breakdown also shows Coverage with waste: 134.4 sq ft; Net floor area: 120 sq ft. Replace the example values with field measurements and the exact product coverage, yield or package size you plan to buy.

For this tile calculator, the inputs with the greatest practical effect are project length, project width and tile width. Recalculate when any of those change; do not reuse a result from a different room, run, layer depth or product specification.