How to calculate tile
Tiles = ⌈ Area ÷ (tile L × tile W ÷ 144) × (1 + waste) ⌉
Worked example. Tiles needed: 88 tiles.
Example inputs — Area length: 10 ft; Area width: 8 ft; Tile length: 12 in; Tile width: 12 in; Extra for cuts & waste: 10 %. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Divide the area by the size of one tile, then add 10% (15% for diagonal layouts) for cuts, breakage and future repairs.
Assumptions & limitations
- Results are rounded for display.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
Does grout width matter?
Slightly — grout lines reduce tile count by a small amount, so the waste allowance covers it.