Tile Calculator
Estimate tiles and boxes needed for a floor or wall, with waste allowance.
You need approximately
110 tiles
- Area with 10% waste
- 110 sq ft
How we calculate this
Tiles needed = (room area × waste factor) ÷ tile area, where tile area is tile length × tile width converted to square feet. Boxes needed = waste-adjusted area ÷ coverage per box, when box coverage is known.
Example
Measuring tips
Measure the room's length and width at floor level, and check the tile box for its exact dimensions and coverage per box (usually printed in square feet). A 10% waste allowance covers cuts, breakage and pattern layout; use 15% for diagonal or herringbone patterns.
Common mistakes
- Not adding extra waste allowance for diagonal layouts, which require more cuts.
- Forgetting that tile boxes are sold in fixed coverage increments — round up, never down.
- Measuring only the main floor area and forgetting alcoves, closets or transitions.
Frequently asked questions
How much extra tile should I order for waste?
10% is standard for a straight layout; 15% or more for diagonal, herringbone or rooms with lots of cuts around fixtures.
How many 12x12 tiles do I need per 100 square feet?
Exactly 100 tiles before waste, since each 12x12 tile covers 1 square foot — plus your waste allowance.
Related calculators
Estimates are provided for planning purposes. Actual material requirements may vary based on supplier specifications, compaction, site conditions, installation method, waste, and local code.