Tile Calculator
Estimate floor tile quantity and boxes for a rectangular room. Enter the room dimensions, tile face size, package quantity and waste allowance to plan a tile order.
Your tile estimate will appear here.
How to calculate tiles for a floor
Measure the room length and width in feet, then enter the tile’s actual face dimensions in inches. The calculator divides the total floor area by the face area of one tile, adds the selected cutting allowance and rounds up to full boxes. Grout joint width affects the layout and joint material, but not the nominal tile face area.
Tile count formula
Room area (sq ft) = length × width
Tile face area (sq ft) = tile length (in) × tile width (in) ÷ 144
Base tile count = round up (room area ÷ tile face area)
Boxes = round up [base tile count × (1 + waste allowance ÷ 100) ÷ tiles per box]
Worked example
A 16 ft × 12 ft room is 192 square feet. A 12 × 12-inch tile covers 1 square foot, so the area method starts with 192 tiles. Add the waste allowance and divide by the tiles per box, rounding up to a whole box.
Installation planning notes
- This simple grid count assumes a straight rectangular layout and consistent tile orientation. A diagonal layout or complex room outline can require more cuts.
- Actual box quantities depend on the manufacturer’s stated coverage and the exact number of tiles in the carton.
- Consider extra tiles for future repairs, natural stone shade variation and breakage; ask the supplier about matching batches.
- Plan transitions, thresholds, trim, underlayment and movement joints separately.
Frequently asked questions
Does grout spacing change the tile area?
No. The formula uses the tile’s face area. Grout-joint width still matters for layout, edge cuts and grout quantity, which should be planned separately.
Does this include wall tiles?
This page is for a rectangular floor. For a wall, measure its width and height as the room dimensions and use the same area method, checking the layout before ordering.
How much extra tile should I buy?
The allowance depends on tile size, pattern, room shape, cuts and future matching needs. The default 10% is a starting assumption, not a universal requirement.
Related estimators: Flooring Calculator · Paint Coverage Calculator · Fence Calculator.
This is a preliminary quantity estimate. Final layout, substrate preparation, grout joints and installation requirements should follow the tile manufacturer’s instructions and qualified installer advice.