Enter your room size and tile dimensions to instantly find out how many tiles you need — including a recommended wastage allowance to avoid running short.
The Tile Calculator works out how many tiles you need to cover a room based on the room dimensions and individual tile size. It includes a configurable wastage allowance — the extra tiles needed to account for cuts, breakages, and off-cuts — so you order the right quantity the first time. It supports both metric and imperial units and works for floors, walls, or any rectangular surface.
No tutorials. No learning curve. Open it and get started.
Runs in your browser. All calculations happen locally and instantly — no data is sent anywhere and it works offline once loaded.
Completely free. No trial period. No premium tier for basic functionality. No account required.
One job, done well. The Tile Calculator was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions — just a fast, accurate tile quantity estimator.
Why should I add a wastage allowance?
Wastage accounts for tiles cut to fit edges, corners, and around obstacles, as well as breakages during installation. A typical allowance is 10% for straight layouts and 15% for diagonal or complex patterns. Ordering too few tiles is a common and costly mistake.
What units does the calculator support?
The calculator supports both metric (centimetres and metres) and imperial (inches and feet) units. You can enter your room and tile dimensions in whichever unit your tape measure or product listing uses.
Does the calculator account for grout lines?
The calculator focuses on overall area coverage. Grout lines are typically thin enough (2–5mm) that their effect on tile count is negligible for most projects, but for precision you can add the grout gap to each tile dimension before calculating.
Can I use this for wall tiles as well as floor tiles?
Yes. The calculation logic is identical — enter the wall area dimensions and tile size to get the count needed. For walls with windows or doors, calculate the total wall area first, then subtract the openings.
How do I calculate tiles for an L-shaped or irregular room?
Divide the irregular room into rectangles, calculate the tile count for each section separately, then add the totals together. Apply a single wastage percentage to the combined total.