Quick Answer: A typical shower requires 60-100 sq ft of tile depending on size and configuration. A standard 3-wall shower (36" x 36" x 96") uses about 72 sq ft for walls alone. The formula is: Wall Area = 2 x (depth x height) + (width x height). Tiles per sq ft = 144 / ((tile W + grout) x (tile H + grout)). For 3" x 6" subway tile with 1/8" grout, that is 7.6 tiles per sq ft. Add 15% waste for shower cuts. A 72 sq ft shower needs approximately 630 subway tiles.
Calculate how much tile you need for your shower project. Enter your shower dimensions, pick a tile size, and get the exact tile count for walls, floor, ceiling, and niches — with waste and cost estimates included.
How to Measure Your Shower for Tile
Accurate measurements are the foundation of a successful tile job. Follow these steps to get your numbers right:
- Width: Measure the interior width of the shower opening from wall to wall. For corner showers, measure both walls from the corner to the opening.
- Depth: Measure from the back wall to the front edge of the shower curb or opening.
- Height: Measure from the finished floor (or top of tub for alcove) to where you want tile to stop. Floor-to-ceiling is 96" (8 ft). Tub surrounds are typically 60" above the tub rim.
- Niches: Measure the width, height, and depth of each recessed niche. Standard niches are 12" x 16" x 3.5".
- Do not deduct for the shower door opening — tile runs wall to wall on all tiled surfaces.
Best Tile Sizes for Showers
Tile size affects both the look and the labor involved. Here is a guide to the most popular shower tile sizes:
| Tile Size | Best For | Tiles per sq ft | Price Range |
|---|---|---|---|
| 3" x 6" Subway | Walls | 7.6 | $3-10/sq ft |
| 4" x 4" | Walls, niches | 8.5 | $2-8/sq ft |
| 6" x 6" | Walls, floors | 3.8 | $3-12/sq ft |
| 12" x 12" | Walls | 1.0 | $4-15/sq ft |
| 12" x 24" | Walls (modern) | 0.5 | $5-20/sq ft |
| 1" x 1" Mosaic | Floors, niches, accents | 113 | $8-25/sq ft |
Popular Shower Tile Patterns
- Horizontal Subway (Running Bond): The classic look. Subway tiles laid horizontally with each row offset by half. Clean, timeless, and the easiest pattern to install in a shower.
- Vertical Stack Bond: Subway or rectangular tiles stacked straight up with aligned grout lines. Creates a modern, elongated look that makes showers feel taller.
- Herringbone: Rectangular tiles laid in a zigzag V-pattern. High visual impact, but generates more waste and takes longer to install. Best used as an accent wall or niche detail.
- Large-Format Linear: 12" x 24" tiles with minimal grout lines. Creates a clean, spa-like aesthetic. Requires very flat walls and careful waterproofing.
- Mosaic Floor: Small 1" x 1" or 2" x 2" tiles on the shower floor. Essential for proper drainage — small tiles follow the slope toward the drain better than large tiles.
Waterproofing Tips for Shower Tile
Tile alone is not waterproof. Proper waterproofing behind the tile is critical to prevent mold, rot, and structural damage. Key considerations:
- Waterproof membrane: Apply a liquid membrane (RedGard, Hydroban) or sheet membrane (Kerdi, GoBoard) to all shower surfaces before tiling. This is not optional.
- Cement board substrate: Use cement board (Durock, Hardiebacker) or foam board (Kerdi-Board, GoBoard) as the tile substrate — never green board or regular drywall.
- Niche waterproofing: Niches are the most leak-prone area. Wrap all niche surfaces with membrane, especially the bottom shelf which must slope outward slightly to shed water.
- Shower pan: The shower floor needs a pre-sloped mortar bed or a prefabricated pan with integrated waterproofing. The slope should be 1/4" per foot toward the drain.
- Grout is not waterproof: Use epoxy grout or seal cement-based grout after curing. Reseal grout annually in high-use showers.
Formula Summary
Wall Area (standard 3-wall): A_wall = 2 x (D x H) + (W x H)
Wall Area (corner 2-wall): A_wall = (W x H) + (D x H)
Floor / Ceiling Area: A = W x D
Niche Area (per niche): A_niche = (Nw x Nh) + 2(Nd x Nh) + 2(Nw x Nd)
Tiles = ⌈A_total x 144 / ((Tw + G)(Th + G)) x (1 + W%)⌉
where W = shower width (ft), D = depth (ft), H = height (ft), Tw = tile width (in), Th = tile height (in), G = grout width (in), W% = waste factor.
| Constant | Value |
|---|---|
| Default shower height | 96" (8 ft floor-to-ceiling) |
| Alcove tub height | 60" (5 ft above tub) |
| Default waste factor | 15% |
| Default grout width | 1/8" (0.125") |
| Standard niche size | 12" x 16" x 3.5" |
| Box size estimate | ~10 sq ft per box |
Assumptions: Waste factor of 15% accounts for cuts around corners, fixtures, niches, and the shower valve. Niche area includes all 5 interior surfaces (back, 2 sides, top, bottom). Box count assumes approximately 10 sq ft of tile per box, adjusted by tile size.
Related Calculators
- Tile Calculator — general-purpose tile calculator for floors, walls, and custom areas
- Grout Calculator — calculate how much grout you need for your tile project
- Tile Installation Cost Calculator — estimate professional tile installation costs in your area
- Bathroom Remodel Cost Calculator — full bathroom renovation cost estimates with local labor rates
Estimates are for planning purposes only. Consult a qualified contractor for critical projects. Actual material requirements may vary based on site conditions, waste, and installation methods.
Pricing last verified: February 2026. Material prices vary by region, season, and supplier. Prices shown are national averages for planning purposes.