Tile Calculator
Estimate tiles, grout, wastage and boxes for any floor, wall, bathroom or kitchen — with engineering drawings and a printable PDF report.
Material cost estimate (optional)
How to estimate tiles
Three simple steps to a complete tile and grout estimate.
Floor, wall, bathroom, kitchen, or custom — choose the area type so the right dimensions are asked for.
Add room dimensions, tile size, grout gap, and wastage. Metric and imperial both work.
Total area, tile count, wastage buffer, boxes needed, and optional cost — broken down clearly.
Tile Calculator — Free & Accurate
Our tile calculator helps homeowners, tilers, and contractors estimate exactly how many tiles a project will need. Pick from floor, wall, bathroom, kitchen, or a custom area, enter the room dimensions and tile size, and get a complete material list in seconds.
The calculator accounts for the grout joint between tiles, applies your chosen wastage percentage (5% / 10% / 15%) for cuts, breakage, and pattern layout, and tells you how many boxes to buy based on your supplier's tiles-per-box count. Pick from standard tile sizes (12×12 in, 24×24 in, 24×48 in, 600×600 mm, 600×1200 mm) or define a custom tile size.
Results show total area, tile size, tile count, wastage allowance, and boxes needed, with an optional cost estimate in your local currency that includes both tile and grout pricing. Everything runs in your browser — no signup, no data sent to any server.
Why use this calculator?
Built for the site, not the spec sheet — simple, fast, and accurate.
No spreadsheets, no formulas to memorise. Type your sizes, hit calculate, and you're done.
Picks the right area math for each room type, applies grout joints, and handles wastage like a real tiler would.
Everything runs in your browser. Your dimensions never leave your device.
Mix metres, feet, inches, and centimetres on the same job — the math converts cleanly.
Tells you total area, tile count, and how many boxes to buy — exactly what your supplier needs.
Open it on your phone right at the workshop. Fully responsive, no app needed.
Related construction tools
Free, browser-based, and built the same way as the tile calculator.
Frequently asked questions
5% is the minimum for straight layouts on simple rectangular rooms. 10% (the default) covers most jobs — straight rooms with a few cuts at edges. Use 15% for diagonal patterns, herringbone, large-format tiles, or rooms with awkward shapes. It's also worth keeping a few extra tiles aside for future repairs since dye lots can vary between production runs.
Each tile is treated as its given dimensions plus the grout joint on two faces, giving an effective area of (TileL + joint) × (TileW + joint). We divide the total room area by this effective tile area and round up. The wastage percentage is then applied on top of that count.
Enter how many tiles come in one box (check the box label or the supplier's product page) and we'll divide the total tile count by that number and round up. Common values are 6 tiles per box for 24×24 in, 4 tiles for 600×1200 mm, and 8–10 tiles for smaller 12×12 in tiles.
2–3 mm is typical for rectified porcelain tiles, 3–5 mm for standard ceramic, and 5–10 mm for natural stone or larger-format tiles. Smaller joints look cleaner but need more precise tile sizes; wider joints accommodate uneven tiles and substrate variation.
Yes. Every dimension has its own unit picker, so you can enter the room in feet, the tile size in millimetres, and the grout gap in inches on the same calculation. The math converts everything to consistent units internally.