Tile Calculator

Calculate how many tiles you need for any floor or wall area, with a wastage buffer.

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The tile calculator tells you how many tiles to buy for any floor or wall area. Enter the room dimensions and tile size — the calculator returns the number of tiles needed with and without a wastage buffer. Defaults to a 10% waste allowance, which you can adjust for complex layouts. Tiling projects almost always require more tiles than a pure area calculation suggests. Cuts are inevitable at edges, corners, and around fixtures. Tiles break during cutting. Patterns like diagonal or herringbone layouts require significantly more cuts than straight horizontal runs and waste more material in the process. Buying the correct quantity upfront prevents the common problem of running short mid-job and finding the original batch is discontinued or differently batched. The calculator works for floor tiles, wall tiles, bathrooms, kitchens, and any rectangular area. For L-shaped or irregular rooms, split the area into rectangles, calculate each separately, and add the totals.

How to Use the Tile Calculator

The Tile Calculator is designed to give you an accurate answer in seconds. Follow these steps:

Step 1: Enter your area length (m) in the Area Length (m) field. The minimum value is 0.1. The default is 4 m. Adjust this to match your specific situation.
Step 2: Enter your area width (m) in the Area Width (m) field. The minimum value is 0.1. The default is 3 m. Adjust this to match your specific situation.
Step 3: Enter your tile length (cm) in the Tile Length (cm) field. The minimum value is 1. The default is 60 cm. Adjust this to match your specific situation.
Step 4: Enter your tile width (cm) in the Tile Width (cm) field. The minimum value is 1. The default is 60 cm. Adjust this to match your specific situation.
Step 5: Enter your wastage (%) in the Wastage (%) field. The valid range is 0 to 50. The default is 10%. Adjust this to match your specific situation.
Step 6: Click Calculate to see your results instantly. The output updates as soon as you submit.

No account or sign-up required. All calculations run locally in your browser — nothing is stored or transmitted to any server.

Example Calculation

Here is what the Tile Calculator produces with its default values. Change any input above to recalculate instantly for your own figures.

Inputs

Area Length (m)4 m
Area Width (m)3 m
Tile Length (cm)60 cm
Tile Width (cm)60 cm
Wastage (%)10%

Results

Total Area (m²)12.00 m²
Tiles Needed (no waste)33 tiles
Tiles Needed (with waste)37 tiles
Tile Size (m²)0.3600 m²

How It Works

Tiles = (Area m²) ÷ (Tile Length m × Tile Width m) × (1 + Waste%)

Formula: Tiles Needed = Floor Area (m²) ÷ Tile Area (m²) × (1 + Waste% ÷ 100) The tile area is the tile length multiplied by the tile width, both converted from centimetres to metres. Example: 4 m × 3 m room (12 m²), 60 cm × 60 cm tiles, 10% waste. Tile area = 0.60 × 0.60 = 0.36 m² Tiles without waste = 12 ÷ 0.36 = 33.3 → round up to 34 Tiles with 10% waste = 34 × 1.10 = 37.4 → buy 38 Wastage guidance by layout type: - Straight/grid layout: 10% is typically sufficient - Offset/brick pattern: 10–15% - Diagonal (45°) layout: 15–20% — diagonal cuts waste more corner material - Herringbone or chevron: 15–20% - Complex shapes (many cuts around fixtures): 15–20% Always round up to the nearest whole tile when buying — you cannot buy a fraction of a tile, and running short at the end of a job is far more disruptive than having a few spares for future repairs.

Frequently Asked Questions

How many tiles do I need for a 12m² floor?

For 60 × 60 cm tiles (0.36 m² each), a 12 m² floor needs 34 tiles without waste, or 38 with a 10% buffer. For 30 × 30 cm tiles (0.09 m² each), you need 134 tiles before waste, or 147 with 10%. Enter your specific tile size in the calculator for an exact count.

How much tile wastage should I allow?

Allow 10% for a straight grid layout in a straightforward rectangular room. Increase to 15% for offset or brick-bond patterns, and 15–20% for diagonal or herringbone layouts which require more cuts. Add another 5% if there are many fixtures to cut around (toilets, vanities, columns). It is better to have 5 extra tiles than to be 2 short at the end.

Should I order extra tiles for repairs?

Yes — always order at least 10% extra and keep the leftover tiles after the job. Tiles get discontinued, and finding an exact match for a cracked or damaged tile years later can be impossible. Storing 5–10 spare tiles costs almost nothing and can save a significant repair bill if one cracks from a heavy drop or grout issue down the line.

How do I calculate tiles for an L-shaped room?

Split the L-shape into two rectangles, measure each section separately, and calculate tile counts for each. Add the results together and apply a single waste percentage to the combined total. For areas with many internal corners (which require additional cuts), increase the waste buffer by 5% above your standard allowance.

Is the tile calculator free?

Yes — free with no sign-up needed. Enter dimensions and tile size for an instant count with adjustable wastage. All calculations run in your browser and no data is stored.

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