← All construction calculators
Tile calculator
Square tiles to cover an area you already know, waste included. Have room dimensions instead? Use the floor tile calculator.
Loading calculators…
How it’s computed
Tiles = ceil(area × (1 + waste) ÷ tile face), where a square tile's face = (edge in inches)² ÷ 144 sqft. Defaults: 12" tile, 10% waste.
Decimal-exact and deterministic: identical inputs always return identical results. This is the same math Ask Donnie’s estimating engine runs — not an approximation, and never a language model doing arithmetic.
Common questions
What about rectangular tile or planks?
This one is square-tile math. For a rectangular unit (like 6×24 planks or pavers), the paver calculator takes length × width separately.
Diagonal or herringbone layout?
Angled layouts cut more at every edge — raise the waste input above the 10% default.
Need the whole estimate, not just this number?
Ask Donnie turns a description or a plan into a full itemized estimate — deterministic math, real cited pricing, an AACE accuracy class. Free to start, watermarked deliverables included.