Tile Calculator: Floor Area, Tiles & Boxes
Estimate floor or wall tile quantities and whole boxes using room dimensions in feet, tile sizes in inches, and adjustable cutting waste. All measurements use US customary units. Defaults are examples; use actual site dimensions and product coverage.
Your Numbers
Results
Results update live as you type. Estimates only — not financial, tax, or investment advice.
The Formula
Tiles = round up((length ft × width ft) × (1 + waste% ÷ 100) ÷ (tile length in × tile width in ÷ 144))
Understanding the Tile Calculator: Floor Area, Tiles & Boxes
Example: a 12 × 10 foot floor is 120 square feet. With 10% waste, buy for 132 square feet. For 12 × 12 inch tiles this is 132 tiles; with 10 tiles per box, round up to 14 boxes.
Enter room dimensions in decimal feet and tile dimensions in inches. Tile area is based on the nominal face size; grout gaps are not included, so this is an area-based purchase estimate rather than a cut layout. Diagonal patterns, niches and large-format layouts can need more waste. Confirm box contents and usable coverage with the supplier.
Check whether your supplier lists nominal tile size, actual tile face dimensions or box coverage. This estimator uses tile face area and ignores grout width; do not treat it as an installation cut plan.
Frequently Asked Questions
Does this plan tile cuts or grout lines?
No. This divides area by tile face area and adds your selected waste. Check your actual layout, grout spacing and manufacturer coverage before buying.
Why round boxes up?
You cannot usually purchase a fraction of a sealed box. Divide required whole tiles by the tiles per box, then round up. Returned boxes and spare tiles depend on store policy.