Tile Calculator – Quick & Accurate Estimates
Our free tile calculator helps you answer the common DIY question: “How many tiles do I need?”. Whether you’re tiling a bathroom wall, kitchen backsplash, or a large floor area, this tool provides fast and reliable estimates. Simply enter your room dimensions, tile size, grout joint width, and your preferred pattern, and the calculator does the rest—accounting for wastage so you don’t run short.
How to Use the Tile Calculator
- Choose your unit system (metric or imperial).
- Add one or more areas by entering their length and width.
- Enter your tile size and grout joint width.
- Select your pattern (straight, brick bond, or diagonal).
- Pick a wastage percentage—10% is standard, but diagonal layouts often need more.
- Click Calculate to see the total tiles required.
Patterns, Grout Joints & Wastage
Your chosen tile pattern and grout joint size both affect how many tiles you’ll need. A straight/stack bond is the most efficient with minimal cutting. Brick bond (50% or 33% offset) creates a more natural look but usually requires 2–5% more tiles. Diagonal layouts are beautiful but wasteful, so plan for at least 10–15% extra. Grout joints should be factored in as they slightly increase the module size of each tile.
Buying & Storage Tips
- Always round up to full boxes—tiles are rarely sold individually.
- Keep at least one spare box for future repairs or extensions.
- Check the batch or dye lot numbers to ensure consistent shading.
- Store leftover tiles in a dry place and label the box with the room name.
Planning Other Surface Projects?
If you’re working on outdoor areas or need to prepare a base, we also recommend:
- Paver Calculator – ideal for patios, driveways, and garden paths.
- Aggregate Calculator – useful for estimating crushed stone or gravel needed for sub-bases under tiles or pavers.