Floor Tile Calculator (with pattern)

Tiles needed = (room area / tile area) × pattern-waste factor. Auto-rounds to whole tiles + box count.

Result

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How to use this calculator

Enter room length × width in feet.
Enter tile dimensions in inches (most US tile is 12″×12″, 6″×24″ plank, or 24″×24″ large-format).
Pick the installation pattern. Herringbone and mixed-size lift waste from 10% → 20%+.
Set extra waste 5-10% if the room has odd corners, closets, or pipe penetrations.
Box coverage is on the tile-box label — typical 10-15 ft² for 12″ tiles, 15-22 ft² for large-format.

About this calculator

Tile-pattern choice drives waste: straight-lay loses ~10% to end-cuts; diagonal adds another 5% because every cut is on the bias; herringbone and randomised mixed-size layouts run 20%+ because the joints offset. Tile Council of North America (TCNA) install guides cite these as standard buffers — plus another 5% for inexperienced installers or rooms with many corners / closets / pipes. Always round UP to whole boxes: it is far cheaper to return one unopened box than to face mid-job dye-lot matching on a re-order. The "boxes to buy" line caps your worst-case overage at one extra box.

Frequently asked

Why round UP to whole boxes?+

Tile manufacturing varies enough between dye lots that mid-job re-orders rarely color-match. Industry rule: buy ≥1 full box extra; return unopened boxes after the job for credit (most US distributors accept 30-day returns).

Does pattern choice really cost 10%+?+

Yes for diagonal / herringbone — the bias cuts can't be reused on the next row, so leftovers go to scrap. TCNA install manuals codify these waste tiers.

What about thresholds / transitions / baseboards?+

Not modeled here. Add 2-3 ft² per door threshold and budget transitions/baseboards separately. Quarter-round at perimeter ≈ 2× perimeter linear feet of finishing pieces.

Source?+

Tile Council of North America (TCNA) Handbook for Ceramic, Glass, and Stone Tile Installation — current edition (waste-factor recommendations per pattern). NRCA / RFCI residential installation tolerances.