Tile Calculator
How many tiles and boxes to buy, including waste
Verified + our stated conventionLast verified 25 September 2026
Your numbers
m
m
cm
cm
%
SCG recommends at least 5–10%; allow more for diagonal patterns or complex rooms
tiles
From the box label; used to work out boxes
Result
Enter your numbers on the left. The result appears here instantly.Enter your numbers above. The result appears here instantly.
Tested examples
(3)
Every example below is an automated test. Click one to try it.
Formula
- Tiles per m² = 1 ÷ (tile width × length in metres)
- Buy = round up(area × tiles per m² × (1 + waste%))
- Boxes = round up(tiles ÷ tiles per box)
Assumptions
- Area method, as described by SCG
- We round up once at the end. SCG’s example rounds 7.407 to 7.4 first, so results can differ by one tile.
- Edges, skirting and special layouts are not included
Sources
(1)
SCG HOME (SCG Distribution)
วิธีคำนวณกระเบื้อง กระเบื้องแต่ละขนาดใช้กี่แผ่นต่อตารางเมตรaccessed 25 September 2026
Internal reference: reference/09_tile_calculation.md
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