Shower Tile Calculator — Free Online Tool
Shower walls are tile's toughest assignment — constant water, niches, and tricky cuts. This shower tile calculator converts your shower's wall dimensions into a tile count with proper waste for 4×4 tiles.
What is the Shower Tile Calculator?
Measure each wall's length and the tile height (typically to 7 feet or the ceiling). Three walls is standard for an alcove shower; walk-ins may have one or two. A 4×4 tile covers 1/9 sq ft, so raw tiles = area × 9.
The 15% waste covers niche cutouts, plumbing penetrations, and slope cuts at the curb — showers waste more tile than floors. Waterproofing (a membrane system, not just “water-resistant” board) matters more than the tile itself. This shower tile calculator assumes 4×4 tiles; use its square-footage figure to convert for subway, mosaic, or large-format tile.
How to use this calculator
- Measure each shower wall length in feet (total them).
- Enter the tile height and number of walls.
- Click Calculate Shower Tile.
- Waterproof with a membrane system before a single tile goes up.
Formula
Frequently asked questions
Does a shower need waterproofing behind tile?
Absolutely — a membrane waterproofing system is essential. Tile and grout are not waterproof. This shower tile calculator handles quantities; waterproofing handles longevity.
Should I tile the shower ceiling?
Recommended for steam showers; otherwise tile to the ceiling in tub-shower combos to protect drywall.
Do niches change the tile count?
The 15% waste allowance covers typical niche and plumbing cutouts.
Small or large tile for shower walls?
Small tile means more grout (better grip on floors); large tile means fewer joints on walls. Both work with proper waterproofing.