How many tiles do I need?

Divide the area to cover by the area of one tile, then add a waste allowance (10% is standard) for cuts and breakage. Enter your sizes above for the exact count.

How much extra tile should I buy for waste?

10% for straight layouts; 15–20% for diagonal or herringbone patterns and for irregular rooms.

How do I get the number of boxes?

Enter the tiles-per-box figure from the product listing and the calculator rounds up to whole boxes.

Tile Calculator

Work out how many tiles you need for a floor or wall. Enter the area and your tile size to get the tile count (with a waste allowance) and the number of boxes.

Tile calculator

Includes a waste allowance (10% is the usual rule for cuts and breakage). Set "tiles per box" to your product's count to also get the number of boxes.

How to use it

Enter the area length and width in feet.
Enter your tile size in inches and a waste % (10% is typical).
Optionally enter tiles per box to get the number of boxes.

How it's calculated

We divide the area you're covering by the area of a single tile, add your waste percentage for cuts and breakage, and round up to whole tiles — then to whole boxes if you enter a tiles-per-box figure.

Frequently asked questions

How many tiles do I need?: Divide the area to cover by the area of one tile, then add a waste allowance (10% is standard) for cuts and breakage. Enter your sizes above for the exact count.
How much extra tile should I buy for waste?: 10% for straight layouts; 15–20% for diagonal or herringbone patterns and for irregular rooms.
How do I get the number of boxes?: Enter the tiles-per-box figure from the product listing and the calculator rounds up to whole boxes.

Embed this calculator

Free to use on your own website — copy and paste this code. All we ask is the link back.

<iframe id="hmc-tile-calculator" src="https://howmanycalc.com/embed/tile-calculator/" title="Tile calculator by HowManyCalc" width="100%" height="520" style="border:1px solid #e4e8ec;border-radius:12px;max-width:680px" loading="lazy"></iframe>
<p style="font:12px sans-serif">Tile calculator by <a href="https://howmanycalc.com/tile-calculator/">HowManyCalc</a></p>
<script>window.addEventListener("message",function(e){if(e.origin==="https://howmanycalc.com"&&e.data&&e.data.type==="hmc-resize"&&e.data.slug==="tile-calculator"){var f=document.getElementById("hmc-tile-calculator");if(f){f.style.height=e.data.height+"px";}}});</script>

Last updated June 2026.