Flooring Tile Estimator
Estimate the number of tiles needed for a room. Enter room dimensions, tile size, grout width, and waste percentage.
Waste Percentage Guide by Pattern & Layout
Choosing the right waste allowance is the most important factor in accurate tile estimation. Under-ordering is far more costly than over-ordering.
| Situation | Recommended waste | Reason |
|---|---|---|
| Simple square/rectangular room | 10% | Minimal cuts, standard layout |
| Rooms with fixtures (toilet, bath, kitchen island) | 12–15% | More cuts around obstacles |
| Diagonal (45°) tile pattern | 15–20% | Corner cuts waste significantly more |
| Large format tiles (60cm×60cm+) | 15–20% | Each cut wastes a larger piece |
| Natural stone with variation | 15–20% | Reject tiles with heavy veining if needed |
| Complex shapes / many alcoves | 20%+ | Many partial cuts across the room |
Pro Tips for Tiling Projects
- →Buy from the same batch (dye lot). Tiles are fired in batches and colour varies between them. Always order everything you need in one purchase from the same lot.
- →Keep spare tiles after installation. Store 5–10 tiles in a dry place. If you ever need to replace a cracked tile, matching tiles from a different batch may look different under light.
- →Start tiling from the centre. Find the centre of the room and start there, so cut tiles at the edges are equal on both sides and symmetrical.
- →Dry-lay before fixing. Lay tiles without adhesive first to check the layout, verify grout joints, and spot any issues before committing.
- →Account for expansion gaps. Always leave a 10–15mm expansion gap at walls and fixed objects, covered with skirting or silicone bead.
Frequently Asked Questions
How do I calculate how many tiles I need?
Divide the room area by the area of one tile (including grout joint). Then add your waste percentage (typically 10%) to cover cuts at edges, corners, and breakage. This calculator does all of that automatically.
What waste percentage should I use for tiles?
Use 10% for simple square rooms with no obstacles. Use 15% for rooms with diagonal patterns, many cuts around fixtures, or complex shapes. Use 20% for large-format tiles (60cm+) where cuts waste more material per tile.
What grout width should I enter?
Standard ceramic/porcelain tiles: 2–3mm grout joints. Large format tiles (60cm+): 3–5mm. Natural stone: 3–6mm. Rectified tiles can use 1–2mm. Check the tile manufacturer’s recommendation for the specific tile you are using.
Should I order extra tiles?
Always order at least 10% extra and keep a few boxes from the same batch after installation. Tile colour varies between production batches (called dye lots). If a tile cracks or chips years later, tiles from a different batch may not match.
How do I estimate tiles for an L-shaped room?
Split the L-shape into two rectangles, calculate each separately using this estimator, then add the totals together and add your waste percentage once on the combined total.
Is this tile estimator free?
Completely free. Enter your dimensions, get your tile count instantly.
What users say about Flooring Tile Estimator
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