How Many Tiles Do I Need?
The tile count is simple math with two traps: the areas people forget to measure, and the waste factor they leave out. Get both right and you order once instead of making a second trip mid-install.
The math, step by step
Measure length × width for each surface to get square feet, subtract large openings, then add the waste factor for your pattern. Divide the total by the coverage printed on the box (sq ft per box) and round up. The tile calculator does this and adds grout and thinset automatically.
What people under-measure
Closets, thresholds and transitions, shower walls and the niche, and the extra cuts around toilets, drains and pipes. Always order attic stock for future repairs, especially on natural stone where a later batch will not match.
FAQ
How much extra tile should I order?
About 10% for a straight layout, 15–20% or more for diagonal, herringbone or lots of cuts, and extra for natural stone so future repairs match.
How do I convert square feet to boxes?
Divide your total square feet (including waste) by the coverage per box printed on the label, then round up to the next full box.