Tile & Grout Quantity Calculator UK
Estimate how many tile boxes and grout bags you’ll need. Enter total area, tile dimensions, box coverage, grout coverage and waste allowance.
How It Works
Effective area = area × (1 + waste/100). Tiles needed = effective area ÷ box coverage (round up). Grout bags = effective area ÷ grout coverage (round up).
For cutting tips, see our How to Cut Tiles Guide.
Choosing Tiles
Porcelain for floors, ceramic for walls. See Best Tiles 2025.
Grout Types
Epoxy for wet rooms, cementitious for dry areas. Compare in our Grout Type Guide.
Preparation
Ensure a flat screed, correct tile adhesive. Learn more in our Tile Preparation Guide.
Key Values
| Entity | Attribute | Value |
|---|---|---|
| Tiling Project | Area | m² |
| Tiling Project | Tile size | mm×mm |
| Tiling Project | Box coverage | m² |
| Tiling Project | Grout coverage | m² |
| Tiling Project | Waste allowance | % |
Frequently Asked Questions
Should I include waste allowance?
Yes—include 5–10% extra to cover cuts and breakages.
How do I calculate box coverage?
Refer to the manufacturer’s specification for m² per box.
What grout coverage to use?
A 5kg grout bag covers ~10m² at standard joints; adjust for wider joints.
Can I use for wall and floor?
Yes—enter the combined area of surfaces to be tiled.
