Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Tile boxes needed
11
Total coverage purchased
165.0
sq ft
Exact boxes before rounding
11.00
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How to use this
- 1Enter area to tile (sq ft).
- 2Enter coverage per box (sq ft).
- 3Enter waste factor (%).
- 4Read your tile boxes needed on the right — it updates as you type.
- 5Hit Share to keep the scenario or send it to someone.
About this calculator
Tile is sold by the box, with each box covering a fixed number of square feet printed on the label, so converting a room's area into a box count requires both accurate area measurement and a waste allowance for cuts, breakage, and pattern layout. This calculator divides your room's total square footage by the coverage per box, applies a waste factor (10% is standard for a straight layout, 15%+ for diagonal or herringbone patterns with more angled cuts), and rounds up to a whole box since partial boxes can't be purchased. Buying slightly extra beyond the calculated minimum is also wise for future repairs, since tile runs and dye lots change over time and matching a broken tile years later from a different production run is often visibly impossible. This tool works the same for floor tile, wall tile, and backsplash tile — just adjust the area and per-box coverage to match your specific product's label.
Worked example
Using the values the calculator loads with:
Inputs
- Area to tile: 150 sq ft
- Coverage per box: 15 sq ft
- Waste factor: 10 %
Results
- Tile boxes needed: 11
- Total coverage purchased: 165
- Exact boxes before rounding: 11
What each field means
Inputs
- Area to tile (sq ft)
- The area to tile used in the calculation, measured in sq ft. Starts at 150 sq ft so you have a working example on load.
- Coverage per box (sq ft)
- The coverage per box used in the calculation, measured in sq ft. Starts at 15 sq ft so you have a working example on load. Accepted range: 1–50 sq ft.
- Waste factor (%)
- The waste factor used in the calculation, measured in %. Starts at 10 % so you have a working example on load. Accepted range: 0–30 %.
Results
- Tile boxes needed
- Returned as a whole number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total coverage purchased
- sq ft
- Exact boxes before rounding
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How much waste factor should I use for tile?
10% is standard for a straight grid layout, while diagonal, herringbone, or rooms with lots of jogs and cutouts should use 15-20% to cover the extra angled cuts and offcuts that can't be reused.
Should I buy extra tile beyond the calculated amount for future repairs?
Yes, buying one extra box beyond your waste-adjusted total is a common practice since tile dye lots change between production runs, making it hard to exactly match a replacement years later.
How do I find coverage per box?
It's printed directly on the tile box, usually in square feet, and varies by tile size — larger format tiles often have fewer pieces per box but similar or higher total square footage coverage.
Does grout line width affect how much tile I need?
Wider grout lines slightly reduce actual tile coverage per square foot of floor since more area is grout rather than tile, but this effect is small enough that the standard waste factor already accounts for it.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Grout Pounds Calculator
Estimate pounds of grout needed based on tile size, joint width, and area.
Thinset Bags Calculator
Figure out how many bags of thinset mortar to buy based on tile area and trowel size.
Vinyl Plank Flooring Boxes Calculator
Turn a room's square footage into the number of LVP flooring boxes to order.
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Tile Boxes Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/tile-boxes-calculator
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/tile-boxes-calculator" target="_blank" rel="noopener">Tile Boxes Calculator — RevenueLab</a> (2026).</p>
Source: [Tile Boxes Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/tile-boxes-calculator) (2026).