Check the path
Your calculation audit
Every total is shown as a short sequence so you can see what was measured, deducted, adjusted and rounded.
- 01Awaiting valid measurementsComplete the fields above to reveal the formula path.
Tiling & Surfaces
Tile, grout & adhesive calculator
Estimate tile pieces, packs and optional approximate grout and adhesive for a surface area.
Transparent formulaFormula v1.0 · surface area ÷ tile area × waste allowance
Scope boundary: Waterproofing, substrate suitability, movement joints and compliance are outside this tool's scope.
Measure clearly
Simple guidance
Use the finished tileable wall or floor area. Record the actual tile dimensions from the box, then add a practical cut allowance for edges, corners and spares.
Worked example
Follow the same logic
An 8 m² surface using 600 × 300 mm tiles needs about 44.5 tiles before a 10% cut allowance, then rounds to your pack size.
Planning tipWrite down the product factor or pack size you used, so a later change is easy to trace.
Before you buy
Three quick checks
- 01
Measure the finished tileable surface, not the room footprint.
- 02
Use the exact tile size and tiles-per-pack from the box.
- 03
Keep grout and adhesive outputs as indicative product checks.
Quick answers
Useful to know
How much tile waste should I allow?
Allowance depends on the layout, cuts, diagonal patterns, breakage and whether you want spare tiles. Keep the chosen percentage visible in the result.
Are grout and adhesive exact quantities?
No. They are approximate prompts only; joint width, tile profile, substrate and the chosen product change actual usage.
Review record
Transparent, source-ready method
Last reviewed: 15 October 2026. Formula version: v1.0. Source/review data to be added — Calculator.Shop does not present placeholder figures as an authoritative trade specification.