Flooring & Tile Quantity Calculator
Stop guessing at the checkout. Enter your room size and tile dimensions to find exactly how many tiles — and boxes — to buy, wastage included.
A 10% wastage allowance covers cuts and breakage for a simple layout; use 15-20% for diagonal or patterned installs.
How to Use the Tile Quantity Calculator
Measure twice, buy once.
Measure your room
Enter the length and width of the room you're tiling. For irregular rooms, measure the largest rectangle and add extra sections separately.
Enter your tile size
Check the tile packaging or product listing for exact dimensions, plus how many tiles come per box.
Get your shopping quantity
See the total tiles needed with wastage included, plus how many full boxes to buy.
How This Calculator Works
Simple area math, with real-world buying habits built in.
📐 Area-based calculation
Room area is divided by the area of a single tile to get a baseline count, then a wastage percentage is added to cover cuts around edges, corners, and any breakage during installation.
📦 Rounded to full boxes
Since tile is almost always sold by the box, the final count is rounded up to the nearest full box — so you know exactly how many boxes to add to your cart.
Tips for Tile Shopping
Avoid the most common tiling project mistakes.
✅ Getting it right
- Buy tile from the same production batch/lot to avoid subtle color differences
- Keep a few leftover tiles for future repairs
- Measure the room again after removing old flooring, if possible
⚠️ Common mistakes
- Forgetting to add wastage for diagonal or herringbone patterns
- Not accounting for closets, alcoves, or irregular room shapes
- Buying loose tiles instead of rounding up to full boxes
Frequently Asked Questions
Common questions about tile and flooring quantities.
A common rule of thumb is 10% extra for simple rectangular rooms, and 15-20% extra for rooms with diagonal layouts, lots of cuts, or intricate patterns.
Divide the total room area by the area of a single tile, then round up and add a wastage allowance to cover cuts, breakage, and future repairs.
Most retailers sell tile by the box, with a fixed number of tiles or square footage per box. It's usually best to round up to the nearest full box rather than buying loose pieces.
Slightly. Wider grout lines mean each tile effectively covers a bit less floor area, but for most standard installations this difference is small enough that the wastage allowance already covers it.