Tile Calculator

Rooms / Areas (rectangles)

Length	Width	Unit	Action

Drag & drop CSV to fill rooms (length,width per line)

Exclusions (subtract rectangles, optional)

Length	Width	Action

Drag & drop CSV to fill exclusions (length,width per line)

Tile Size

Common tiles: 12×24 in, 24×24 in, 300×600 mm (30×60 cm)

Layout & Waste

Pattern affects recommended minimum waste (10–18%). You can override.

Grout Gap (visual note)

Gap does not change area math, but may influence cuts and waste.

Tile Calculator – Quick Cheat Sheet

Net Area = sum of room rectangles − exclusions (islands, cabinets, shower curb, etc.).
Tile Count (no waste) = Net Area ÷ Tile Area (round up).
Waste adds extra tiles for cuts, breakage, and pattern layout. Typical: Straight 10%, Diagonal 15%, Herringbone 18%.
Boxes = Total Tiles ÷ Tiles per box (round up).
Units: Rooms in ft or m; Tiles in in or cm. All math is converted consistently.
Grout Gap is primarily visual; it doesn’t change total area but may justify higher waste for complex layouts.
Tip: Over-order a few spare tiles for future repairs, especially for dyed/veined batches.

Edge cases & notes

Very irregular rooms? Approximate with multiple rectangles and use exclusions for voids.
Large format tiles (≥24") and diagonal/herringbone layouts generally require more waste.
Always verify lot/batch color; mixing boxes from different lots can show shade variation.