Tile Calculators
Count tiles and boxes for floors, walls and backsplashes, with grout joints and the extra you need for diagonal or herringbone layouts.
All tile calculators
Coming soon: Grout · Thinset / adhesive · Backsplash
How tile estimating works
Tile quantities depend on three things: the area, the footprint of each tile including its grout joint, and the waste allowance for your layout. A straight grid wastes the least, offset (brick-bond) a little more, and diagonal and herringbone layouts create many angled cuts at the edges. Small rooms waste proportionally more because a larger share of tiles touch a wall.
Because tiles come in boxes and shade can vary between production batches, we always round up to whole boxes and recommend keeping a few spares for future repairs. Adhesive and grout are estimated separately on the bag — our tile calculator gives a starting figure for adhesive.
Glossary
- Thinset (US) / tile adhesive (UK)
- cement-based bonding mortar
- Grout joint
- gap between tiles filled with grout
- Large-format tile
- tiles over about 15 in (38 cm) on one side
Updated by the DIYCalcLab Editorial Team · How we calculate
Guides
- How to Measure a Room for FlooringMeasure rectangular and irregular rooms for laminate, vinyl plank and hardwood, add the right waste factor and convert area to boxes — with diagrams in words and worked examples.
- Tile Waste Factor Explained: How Many Extra Tiles to BuyWhy tile jobs need extra tiles, how layout, tile size and room shape change the waste factor, and how to turn area into boxes with spares.
Other categories
ConcretePaint & WallpaperFlooringRoofingLandscapingDeckingFencingDrywall (Plasterboard)Framing & LumberMasonryConversions