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Tile Calculator

Enter your room dimensions and tile size to get an accurate tile, box and cost estimate in seconds.

Room / Space Type

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How to Measure and Estimate Tiles

A quick primer on getting an accurate tile count, whether you use this calculator or work it out by hand.

Measure the Room

Measure the length and width of each area in feet and inches. For odd-shaped rooms, split the space into rectangles (e.g. an L-shaped room becomes two rectangles) and add a row for each — the calculator totals them automatically.

Add Grout Spacing

Grout width is the gap left between tiles. It's small, but it slightly increases each tile's effective footprint, so a 2-3 mm grout line on a large-format tile can shift the count by a tile or two over a big room. Include it for an accurate order quantity.

Add Wastage

Wastage covers tiles lost to cutting around corners, doors and fittings, plus breakage in transit. 10% is the typical allowance for a simple rectangular room; irregular layouts, diagonal laying patterns or a lot of cutting (stairs, borders) call for 15-20%.

Read the Result

The total shown is already rounded up to a whole number of tiles and includes your wastage allowance. Convert it to boxes using your tile's box quantity, and round up again — part boxes are rarely sold or returned individually.

Frequently Asked Questions

Common questions about estimating tile quantity, boxes and wastage.

Split the room into simple rectangles and measure each one separately — for example, an L-shaped living room becomes two rectangles. Add a row for each rectangle in the calculator; it adds up the areas for you before applying wastage.
No, skirting (the strip of tile along the wall-floor junction) and dado (a wall band, common in kitchens and bathrooms) are usually a different size or finish from the main floor tile. Measure their running length separately and calculate them as their own "room".
The area maths is the same either way — length x width. What usually differs is the wastage: walls with more fittings, switches or windows tend to need a higher wastage allowance than a plain floor, and wall tile boxes often hold a different tile count than floor tile boxes.
Yes. Tile batches (dye lots) vary slightly in shade between production runs, so a tile bought today to replace one broken in two years may not match. Buying one or two extra boxes at the time of your original order, and storing them, is the standard way to guard against this.
It depends on the tile size and collection — larger format tiles come fewer to a box, smaller ones more. Use the "Tiles per box" selector in the result card to match your specific product, or check the box quantity listed on the product page before ordering.
Generally no — only unopened, undamaged boxes in original packaging within our return window can be returned (see our FAQ page for the full return policy). This is exactly why ordering the right quantity, with sensible wastage, matters.
Each tile effectively occupies its printed size plus the grout gap around it. Over an entire room this adds up — a 600x600 mm tile with 3 mm grout covers a little less clean area per tile than the same tile with no grout, so slightly more tiles are needed to cover the same room.
10% is a safe default for a simple rectangular room laid in a standard grid pattern. Increase it to 15-20% for rooms with many corners, diagonal or herringbone laying patterns, stairs, or a lot of cutting around fixtures.