Shower Tile Calculator
Calculate exactly how much shower tile to buy — surface area, waste allowance, tiles & boxes needed, plus an installed cost estimate. Includes a layout-pattern comparison and a downloadable PDF shopping list.
| Layout Pattern | Waste % | Tile Needed | Boxes | Tile Cost | Total Cost | Difficulty |
|---|---|---|---|---|---|---|
| Calculate to see comparison | ||||||
Calculate to see comparison
How to Use the Shower Tile Calculator
Turn three measurements into a shopping list — square footage, waste allowance, tile count, boxes to buy and an installed cost — in four steps.
Measure the shower
Pick alcove or corner, then enter the back wall width, the side wall depth and how far up the wall you’re tiling. Switch the floor and ceiling on if they’re being tiled too — each one adds its own surface to the total.
Enter the tile you’re buying
Tile width and length, price per square foot, and the coverage per box printed on the label. The box figure is what turns square footage into the number you actually order at the counter.
Choose the layout pattern
Straight, offset, diagonal or herringbone. Each one sets a recommended waste factor, because more cuts means more tile in the skip — and you can override the percentage if your walls are out of square.
Add labor and save the PDF
Set your installer’s rate per square foot, keep or drop setting materials, then open the pattern comparison. Download the two-page report and take the box count straight to the tile shop.
What’s Included
Most tile calculators stop at square footage. Tile isn’t sold by the square foot — it’s sold by the box, and that’s where orders go wrong.
Boxes, not just square feet
Enter the coverage printed on the box and the estimate rounds up to whole boxes, alongside the individual tile count. That’s the number the supplier needs and the one that decides what you pay.
Five layout patterns compared
Straight, offset, diagonal, herringbone and modular, each with its own waste allowance. The comparison table prices all five on your shower so you can see what a fancier layout costs before you commit.
Alcove and corner geometry
An alcove has three tiled walls, a corner has two. Pick the configuration and the side wall count follows automatically, so you’re not doubling a wall that’s actually glass.
Floor and ceiling as separate surfaces
Tiling the pan or running tile overhead in a steam-style enclosure changes the order significantly. Toggle each one and the surface bars show exactly what share of the total it represents.
Installed cost, not just tile cost
Tile material, setting materials — thinset, grout, backer board and waterproofing — and labor at your own rate, split out in a doughnut chart. Switch labor off to price a DIY weekend instead.
Branded PDF shopping list
Two pages with the full breakdown, shopping snapshot, pattern comparison and a surface detail sheet showing the dimensions behind every figure — useful at the tile counter and with your installer.
By the Numbers
What the calculator models and the assumptions behind it.
straight to modular
walls, floor, ceiling
set by your pattern
typical coverage
no sign-up needed
Built for the Trip to the Tile Shop
Running short mid-job is the expensive mistake, because the replacement box rarely matches. This is the arithmetic that prevents it.
DIYers ordering their own tile
You’re buying the material and doing the work. Walk in knowing the box count, the waste allowance and what the setting materials add, rather than trusting an estimate scribbled on the back of a sample.
Anyone checking a tiler’s quote
If a quote lists a lump sum for tile, rebuild it here from your own measurements. Square footage, waste and labor rate are the three numbers worth questioning, and they’re all visible.
People choosing between tiles
A $4 ceramic and a $14 porcelain in the same shower are two different budgets. Swap the price and the tile size and watch the installed total move before you fall in love with a sample.
Measure Twice, Then Buy the Extra Box
Seven things that decide whether your tile order is right the first time.
- 1Measure each wall separately, at more than one height. Shower walls are often out of plumb and out of square, especially in older houses, so a single measurement at chest height can be an inch off at the ceiling. Use the largest figure — you can cut tile down, you can’t stretch it.
- 2Order everything in one go, from the same batch. Tile is produced in dye lots and shade varies between them. A second order placed a week later can arrive visibly different, and on a shower wall that difference is impossible to hide. Ask the supplier to confirm all boxes are the same lot.
- 3The pattern sets the waste, not your optimism. A straight stack wastes little; herringbone and diagonal layouts need a cut at almost every edge. The calculator raises the allowance automatically when you switch patterns, and that extra tile is genuinely consumed, not padding.
- 4Large-format tile needs more waste, not less. A big cut on a 24-inch tile writes off a lot of material, and large formats also need a flatter substrate and are less forgiving of a wall that bows. Push the waste factor up rather than down when the tile is oversized.
- 5Budget for what goes behind the tile. Thinset, grout, backer board and a proper waterproofing membrane are a real line, not an afterthought — and in a wet area they’re what keeps water out of the framing. Never tile a shower over standard drywall or green board alone.
- 6The floor usually wants a different tile. A shower pan slopes toward the drain, so small mosaic tile conforms to it and the extra grout lines add grip. Check the slip rating on anything you’re standing on wet, and price the floor separately from the walls.
- 7Keep a full box when the job’s done. Tile lines get discontinued, and a cracked tile years later is a small repair if you have spares and a full re-tile if you don’t. Store the leftovers somewhere dry and label them with the room.
Frequently Asked Questions
Answers to the most common questions about measuring, waste allowance, box counts and installed tile costs.
How do I measure a shower for tile?
Measure the width of the back wall, the depth of the shower from the back wall to the opening, and how high up the wall the tile will run — most people tile to the ceiling or to around 96 inches. Multiply each wall’s width by its height and add them together, which is what the calculator does once you choose alcove or corner. Measure at more than one height on each wall and use the largest number, because shower walls are rarely perfectly square.
How much extra tile should I buy for waste?
Around 10% is the usual starting point for a simple straight layout, rising to roughly 15% for diagonal work and 20% or more for herringbone, because those patterns need a cut at nearly every edge. Add more if the tile is large-format, if the walls are noticeably out of square, or if the tile is one you’d struggle to reorder. The allowance covers cuts, breakage during installation and a few spares for future repairs — it isn’t money wasted.
How many boxes of tile do I need?
Divide your total tile needed, including waste, by the coverage printed on the box, then round up — you can’t buy two-thirds of a box. Coverage varies by tile size and manufacturer, commonly somewhere in the 10 to 15 square foot range, so check the label of the specific tile you’re buying rather than assuming. Enter that figure above and the calculator returns the whole-box count along with the individual tile count.
Does the layout pattern change how much tile I need?
The area you’re covering stays the same, but the tile you have to buy doesn’t. A straight stack lines up cleanly and produces relatively few offcuts; offset, diagonal and herringbone layouts all need angled or partial tiles at the edges, and the remainder of each cut usually can’t be used elsewhere. Patterns also take longer to set, which shows up in the labor rate. Open the pattern comparison above to see the tile, boxes and total for all five layouts on your own shower.
How much does it cost to tile a shower?
The installed cost has three parts: the tile itself, the setting materials behind it, and labor. Tile prices span a huge range — basic ceramic and designer porcelain or stone are not remotely the same budget — and labor rates vary by region and by how complex the layout is. Enter your own tile price and your installer’s rate per square foot above and the estimate shows the split, plus an installed cost per square foot you can compare against quotes. Switch labor off to see the material-only figure for a DIY job.
What are setting materials, and do I need them?
They’re everything that goes on before and between the tile: thinset mortar, grout, cement backer board and a waterproofing membrane. In a shower they aren’t optional — the membrane is what stops water reaching the framing behind the wall, and tile alone is not waterproof. The calculator estimates them at a rate per square foot of coverage, which you can switch off if your contractor is supplying them under their own line.
Should I tile the shower ceiling and floor?
The floor depends on your pan — a tiled pan needs tile, while a moulded acrylic or solid-surface base doesn’t. If you are tiling it, small mosaic tile is the usual choice because it follows the slope to the drain and the extra grout lines add grip underfoot. Ceilings are more of a judgement call: they make sense for enclosed or steam showers where moisture collects overhead, and they’re a straightforward way to make a small shower feel finished. Both are toggles above, so you can see what each adds before deciding.