Tile Calculator

Tell us your room size and tile dimensions, and we'll work out exactly how many tiles (and boxes) to buy.

📖 How it works & FAQ

Area to cover (sq ft)

Tile width (in)

Tile height (in)

Waste %

Tiles per box (optional)

What this tile calculator does

Buying tile is one of those jobs where guessing costs money. Order too few and you're back at the store hunting for a matching dye lot; order way too many and you've paid for boxes you'll never open. This calculator turns your room measurements into a clear tile count so you can shop with confidence.

It works for floors, walls, backsplashes and showers, and with any tile shape — square, rectangular subway, or large-format. Just measure the area you want to cover and tell us the size of a single tile.

The math behind it

Each tile covers tile width × tile height square inches. Because there are 144 square inches in a square foot, one square foot holds 144 ÷ (width × height) tiles. We multiply that by your area, then add your waste percentage for cuts, breakage and future repairs, and round up to whole tiles. If you enter how many tiles come in a box, we divide and round up to whole boxes too. These are planning estimates, not professional installation advice — confirm quantities with your tile supplier before ordering.

How to use it

Measure the area you're tiling in square feet and enter it in Area to cover.
Enter the width and height of one tile in inches.
Set a waste % — 10% is typical, more for diagonal or intricate layouts.
Optionally add tiles per box to see how many boxes to buy. Results and the grid preview update as you type.

FAQ

How much waste should I add?: Use 10% for a simple straight layout, 15% for diagonal or herringbone patterns, and up to 20% for rooms with lots of cuts or angles.
How do I find my area in square feet?: Multiply the length by the width of the space in feet. For odd shapes, split the room into rectangles, calculate each, and add them together.
Why does it round up?: You can't buy a fraction of a tile or a partial box, so we always round up to make sure you have enough to finish the job.
Does it work for wall tile?: Yes. Measure the wall area in square feet exactly as you would a floor, then enter your tile size as normal.