Tile Calculator
Find how many tiles and boxes a floor, wall or backsplash needs, for any tile size and grout joint, with the cost.
Change the values and press Calculate to work out your own figures.
From length and width
Enter the area's length and width and the tile size.
Show the working
- tiles = area ÷ ((tile length + joint) × (tile width + joint)), rounded up
From the area
Enter the area and the tile size.
Show the working
- tiles = area ÷ ((tile length + joint) × (tile width + joint)), rounded up
How to use it
Enter the area's length and width and the tile size. Enter the area and the tile size.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
tiles = area ÷ ((tile length + joint) × (tile width + joint)), rounded up
Waste
Add about 10% for cuts and breakage, 15–20% for diagonal or patterned layouts.
Questions
How many 4 × 4 in tiles for a 12 × 1.5 ft backsplash?
179 with 10% extra (162 without).
How many 12 × 12 in tiles per 100 sq ft?
100, before waste and grout joints.
Formulas
tiles = area ÷ ((tile length + joint) × (tile width + joint)), rounded up
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.