Tile Calculator
Estimate the tiles and boxes needed for a floor or wall. Enter the surface size, tile size, grout width, and waste to get a purchase count.
Results
Enter your measurements to see an estimate.
Calculated: — EasyBuildTools, www.easybuildtools.com
How to use the undefined
Enter the surface length and width, then the tile dimensions and grout joint width. The grout gap is added around each tile so the count reflects real coverage. Set a waste allowance for cuts and breakage, enter how many tiles come per box, and optionally a price per box.
Formula and methodology
Surface area = length × width. Effective coverage per tile = ((tile width + grout)÷12) × ((tile height + grout)÷12), in square feet. Tiles needed = surface area ÷ coverage per tile, × (1 + waste%/100), rounded up. Boxes = tiles ÷ tiles per box, rounded up.
Worked example
Floor: 10 ft × 8 ft = 80 sq ft, 12 in tiles, 1/8 in grout, 10% waste, 12 per box. Each tile covers about 1.02 sq ft with the joint. Tiles ≈ 78.4, with waste 87 tiles = 8 boxes. Enter the values above to confirm.
Helpful measurement tips
- Buy all boxes from the same lot number so color and size match.
- Diagonal or patterned layouts waste more — raise the allowance to 15% or more.
- Keep at least a few spare tiles for future repairs.