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
Cuts, breakage, and mistakes. 10% is standard.
Result
Tiles needed
66
Square feet to order
132.0
Tile cost
$554
Thinset bags (50 lb)
2
Grout needed (lb)
47
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter area to tile (sq ft).
- 2Enter tile length (in).
- 3Enter tile width (in).
- 4Enter tile price per sq ft ($).
- 5Enter waste allowance (%) — Cuts, breakage, and mistakes. 10% is standard..
- 6Read your tiles needed on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
Counts tiles by area with a waste allowance, then estimates thinset and grout. Large-format tile needs more thinset than the bag coverage suggests because of the deeper trowel notch.
Worked example
Using the values the calculator loads with:
Inputs
- Area to tile: 120 sq ft
- Tile length: 12 in
- Tile width: 24 in
- Tile price per sq ft: 4.2 $
- Waste allowance: 10 %
Results
- Tiles needed: 66
- Square feet to order: 132
- Tile cost: $554.40
- Thinset bags (50 lb): 2
- Grout needed (lb): 47
What each field means
Inputs
- Area to tile (sq ft)
- The area to tile used in the calculation, measured in sq ft. Starts at 120 sq ft so you have a working example on load.
- Tile length (in)
- The tile length used in the calculation, measured in in. Starts at 12 in so you have a working example on load.
- Tile width (in)
- The tile width used in the calculation, measured in in. Starts at 24 in so you have a working example on load.
- Tile price per sq ft ($)
- The tile price per sq ft used in the calculation, measured in $. Starts at 4.2 $ so you have a working example on load.
- Waste allowance (%)
- Cuts, breakage, and mistakes. 10% is standard.
Results
- Tiles 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.
- Square feet to order
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Tile cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Thinset bags (50 lb)
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Grout needed (lb)
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the tile calculator work?
Counts tiles by area with a waste allowance, then estimates thinset and grout. Large-format tile needs more thinset than the bag coverage suggests because of the deeper trowel notch. The underlying maths is: Tiles = Area ÷ Tile area, plus waste. Grout scales with joint width and tile size.
What do I need to enter?
5 values: area to tile, tile length, tile width, tile price per sq ft, and waste allowance. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the tiles needed result mean?
It is returned as a whole number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary.
Who is this tool for?
It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app.
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
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Tile Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/tile
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/tile" target="_blank" rel="noopener">Tile Calculator — RevenueLab</a> (2026).</p>
Source: [Tile Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/tile) (2026).