Tile Calculator
Calculate how many tiles, boxes, and how much grout you need for a floor or wall tiling project.
Check the box label for this.
Extra material to cover cuts, mistakes, and offcuts.
Tiles needed
147
Boxes needed
15
Grout needed (estimate)
3.07 kg
How this is calculated
Tiles needed = area (with waste) ÷ tile area, rounded up. Boxes needed = tiles ÷ tiles per box, rounded up.
Grout is estimated from tile size, joint width, and tile thickness using a standard grout density — check your specific product's coverage chart for a precise figure.
How to measure for tile
Measure the length and width of the area you're tiling, and the length and width of a single tile — both are usually printed on the box, or measure a sample tile directly.
The grout joint width and tile thickness affect how much grout you'll need — wider joints and thicker tiles both use more grout per square meter.
Frequently asked questions
How many tiles do I need?
Divide the area you're tiling by the area of a single tile, add a waste allowance for cuts and breakage, then round up to whole tiles and boxes. This calculator does that for you.
How much waste allowance should I use for tile?
10% is standard for a straightforward layout. Increase it to 15-20% for diagonal layouts, herringbone patterns, or rooms with lots of corners, alcoves, or cuts around fixtures.
How much grout do I need?
This calculator estimates grout weight from your tile size, joint width, and tile thickness, using a standard grout density. It's a reasonable estimate — check your specific grout product's coverage chart for a more precise figure.
What grout joint width should I use?
1.5-3 mm (1/16 in) is common for rectified porcelain tile with tight joints; 3-6 mm (1/8-1/4 in) is typical for standard ceramic tile; wider joints (6mm+) are common for rustic or handmade tile.
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