Tile Calculator
Estimate rectangular floor, wall or shower-wall area, tile counts and optional box counts.
Area estimate only: no deductions for doors, windows, valves or niches; no grout, layout or quotes. Calculate the shower floor separately in floor mode. Enter the actual tile size. The 15% bathroom/backsplash/shower allowance is a changeable default, not a recommendation. Calculations stay in your browser.
Tile estimate
Surface area:
Area with waste:
Tiles (rounded up):
Boxes (rounded up):
Floor/wall area = length × width. Shower area = back wall width × tiled height + side wall depth × tiled height × (1 for 2 walls, 2 for 3 walls). Tiles = ceiling(area × (1 + waste/100) / tile area); boxes = ceiling(tiles / tiles per box). 1 ft = 0.3048 m; 1 in = 0.0254 m. Counts use unrounded area.
A QUICK WALKTHROUGH
How to use this tool
- Choose metric or imperial units and a surface.
- Enter surface dimensions and your actual tile size.
- Choose waste and optionally enter the integer number of tiles per box.
Tile estimate
Floor/wall area = length × width. Shower area = back wall width × tiled height + side wall depth × tiled height × (1 for 2 walls, 2 for 3 walls). Tiles = ceiling(area × (1 + waste/100) / tile area); boxes = ceiling(tiles / tiles per box). 1 ft = 0.3048 m; 1 in = 0.0254 m. Counts use unrounded area.
Surface
Area estimate only: no deductions for doors, windows, valves or niches; no grout, layout or quotes. Calculate the shower floor separately in floor mode. Enter the actual tile size. The 15% bathroom/backsplash/shower allowance is a changeable default, not a recommendation. Calculations stay in your browser.
Input units
After conversion: surface dimensions 0.001–10,000 m; tile dimensions 0.001–10 m; waste 0–50%; tiles per box 1–1,000,000,000 (integer). Area ≤300,000,000 m²; adjusted area ≤450,000,000 m²; counts ≤1,000,000,000 safe integers. Areas show up to 4 decimals, or scientific notation below 0.00005.
GOOD TO KNOW
Common questions
Does the shower estimate include the floor or deduct openings?
No. It covers two corner walls or three alcove walls at one tiled height. Calculate the floor separately; doors, windows, valves and niches are not deducted.
Waste allowance (%)
Area estimate only: no deductions for doors, windows, valves or niches; no grout, layout or quotes. Calculate the shower floor separately in floor mode. Enter the actual tile size. The 15% bathroom/backsplash/shower allowance is a changeable default, not a recommendation. Calculations stay in your browser.