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Tile Calculator
Estimate tile quantity including a waste allowance.
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Accurate ResultsBased on real formulas
Easy to UseGet results in seconds
Estimate tile quantity including a waste allowance.
How to Calculate Tile Calculator
🧮 Formula
Tiles Needed = ceil((Room Area × (1 + Waste %)) ÷ Tile Area), Boxes Needed = ceil(Tiles Needed ÷ Tiles per Box)
📄 Example Calculation
A 12×10 ft room with 12" tiles, a 10% waste allowance and 10 tiles per box needs 132 tiles — 14 boxes.
Factors That Affect the Result
✓ Tile size
✓ Waste allowance for cuts and breakage
✓ Room shape and layout
✓ Tiles per box
Frequently Asked Questions
How much waste allowance should I use?
10% is standard for a simple layout; increase to 15-20% for diagonal layouts or rooms with many cuts.
Does grout width affect the tile count?
Wider grout lines slightly reduce how many whole tiles fit, but the difference is usually small enough that the waste allowance covers it.
Should I round up the number of boxes?
Yes — always round up to the next full box so you have enough for the whole job in one batch (tile dye lots can vary slightly between batches).
