Formula Used
Box coverage can override simple tile-count coverage when a manufacturer publishes a different value.
How to Use This Calculator
- Select the project type and measurement units.
- Add every floor, wall, ceiling, shower, patio, or custom section.
- Add doors, windows, cabinets, drains, or other untiled openings.
- Enter tile dimensions, grout width, layout pattern, and box details.
- Choose automatic waste or enter a custom waste percentage.
- Add border, accent, stair, slope, material, labor, and cost details.
- Calculate, then copy, download CSV, or print the results as PDF.
Example Tile Calculation
| Input | Example value |
|---|---|
| Floor size | 12 ft × 10 ft |
| Tile size | 12 in × 12 in |
| Layout | Straight grid |
| Waste and repair reserve | 10% + 2% |
| Tiles per box | 10 |
| Calculated tiles | 135 tiles |
| Calculated boxes | 14 boxes |
Plan Tile Quantities More Reliably
Accurate tile planning starts with careful measurements. Divide complicated rooms into simple shapes. Measure every section before selecting materials.
Walls often include doors, windows, cabinets, and fixtures. Enter those spaces as deductions. Keep small openings when cutting complexity remains high.
Layout choice changes the expected waste percentage. Diagonal and herringbone patterns create more cuts. Mixed sizes also need additional planning allowance.
Manufacturer box coverage may differ from mathematical coverage. Printed coverage usually includes nominal sizing assumptions. Use published coverage whenever it is available.
Grout needs depend on joint width and tile thickness. Small mosaics contain far more joints. Product coverage charts provide the safest purchasing estimate.
Adhesive coverage changes with trowel notch and substrate. Uneven surfaces may consume extra material. Always follow the setting material manufacturer’s instructions.
Shower floors can require extra area for slope. Stairs need both treads and risers. Borders and accent strips require separate measurements.
Cost estimates should include more than tile prices. Add labor, tax, delivery, and preparation materials. Include underlayment when the installation system requires it.
Buying full boxes creates unavoidable leftover pieces. Keep matching tiles for future repairs. Dye lots and production batches can change later.
This calculator provides a detailed planning estimate. Site conditions can still affect final quantities. Confirm critical orders with an experienced tile installer.
Measure twice before placing any final material order. Review every deduction, pattern, and waste setting carefully. Good planning prevents costly shortages during installation work.
Frequently Asked Questions
How much extra tile should I buy?
Straight layouts commonly use about ten percent waste. Diagonal, herringbone, complex rooms, and fragile materials often need fifteen to twenty percent.
Should grout joints count as tile coverage?
This calculator bases tile quantity on actual tile face area. That conservative approach helps avoid shortages caused by nominal module assumptions.
Why can box coverage differ from tile dimensions?
Manufacturers may use nominal dimensions, factory tolerances, and packaging rules. Enter the published box coverage when it appears on the carton.
Can I calculate several rooms together?
Yes. Add each room or wall as a separate area. The calculator combines their areas before applying deductions and waste.
How are doors and windows handled?
Add each opening as a deduction. Small openings may be left included when surrounding cuts create similar material usage.
Does the calculator support mosaic sheets?
Yes. Enter the full sheet length and width. Use sheets per box and published coverage for better ordering results.
How are border tiles estimated?
The calculator divides the combined project perimeter by border tile length. It then applies the separate border waste percentage.
Can this estimate grout and adhesive?
Yes. Enter each product’s coverage per bag or unit. Actual consumption still depends on joints, trowels, substrate, and installation technique.
Is the cost estimate a contractor quote?
No. It is a planning estimate based on your entries. Confirm labor, materials, taxes, and site conditions before purchasing.