Shower Tile Calculator

About the Shower Tile Calculator

Tiling a shower involves multiple surfaces: three walls (or more for custom shapes), a floor (often with a different tile), a curb, and possibly niches, benches, or half-walls. Each surface needs to be measured and calculated separately because they often use different tile sizes and types.

This shower tile calculator estimates the total tile needed for the shower walls, converting your wall dimensions to total square footage with a waste factor. Shower walls are typically tiled floor-to-ceiling with 12”×24” or 4”×12” field tile, while the shower floor uses 2”×2” mosaic tiles to follow the slope to the drain.

Shower tile projects require higher waste allowances (15%+) because of the many cuts around plumbing fixtures, niches, corners, and the shower door frame. Precision matters — showers are highly visible, wet environments where every cut and grout line is on display.

When This Page Helps

A typical shower surround requires 60–120+ sq ft of wall tile. At $5–$15/sq ft, the tile alone costs $300–$1,800. Getting the quantity right avoids re-ordering (potential lot mismatch) and prevents wasting expensive material.

How to Use the Inputs

1. Measure each shower wall width and height in feet.
2. Enter the combined wall area or each wall separately.
3. Deduct the shower door or curtain opening if it's not tiled.
4. Enter the tile size.
5. Set a waste factor of 15% for shower projects.
6. Review the total tile count and boxes.

Example Calculation

Tips & Best Practices

• Use waterproof membrane (KERDI, RedGard) over cement board before tiling.
• Tile the ceiling to prevent moisture damage in steam showers.
• Use 2” mosaic tile for the shower floor — it conforms to the drain slope.
• Plan niche locations to align with field tile courses for clean cuts.
• Slope the shower floor 1/4” per foot toward the drain.
• Install a linear drain for larger tiles on the shower floor.
• Use caulk (not grout) at change-of-plane joints (walls to floor, wall to wall).

Planning a Shower Tile Project

Measure each wall separately. Standard showers have 3 tiled walls plus a curb. Walk-in showers may have 3–4 full walls. Measure from finished floor to ceiling (or desired tile height). Deduct the door/curtain opening.

Waterproofing is Critical

Every shower needs a waterproof membrane system. Options include sheet membrane (KERDI), liquid-applied membrane (RedGard, Hydroban), or foam board panels with sealed joints. The waterproofing must be continuous from floor to at least 6” above the showerhead.

Shower Niche Planning

Standard niches are 12”×12” or 12”×24” to align with tile coursing. Each niche adds 3–5 sq ft of tiled surface (inside walls, back, and shelves). Plan niches between studs and waterproof all surfaces inside the niche.

Shower Floor Requirements

The shower floor requires a sloped mortar bed or pre-formed pan, a waterproof membrane, and mosaic tile. The slope should be 1/4” per foot toward the drain center. Linear drains allow larger tiles and a single-direction slope.

Frequently Asked Questions

• How much tile do I need for a standard shower?

  A 3-wall, 3×5 ft shower with 8-ft ceiling has about 96 sq ft of wall area (3+5+3+5 = 16 ft perimeter × 8 ft height − door area). With 15% waste, buy ~110 sq ft of tile.

• What tile is best for shower walls?

  Large-format porcelain (12”×24”) is the current favorite — fewer grout lines mean less maintenance. Subway tile is a timeless choice. Natural stone is premium but requires sealing. Use porcelain or ceramic rated for wall use.

• What tile is best for the shower floor?

  2”×2” or smaller mosaic tile on mesh backing. The small tiles follow the slope to the drain and provide adequate slip resistance from the many grout lines. Avoid large tiles on sloped shower floors.

• Do I need cement board for a shower?

  Yes. Standard drywall is not suitable for wet areas. Use cement board (Durock, Hardiebacker) or a foam board system (KERDI-Board, GoBoard). Apply a waterproofing membrane over the assembly.

• How much does it cost to tile a shower?

  DIY materials: $300–$1,500 (tile + substrate + waterproofing + thinset + grout). Professional installation: $1,500–$5,000+ for a standard shower. Custom showers with niches, benches, and premium tile cost more.

• Should I tile the shower ceiling?

  Yes, if possible. Tiling the ceiling prevents moisture damage and mold growth. It's essential for steam showers. If not tiling, use moisture-resistant paint rated for wet environments.