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Your calculation audit
Every total is shown as a short sequence so you can see what was measured, deducted, adjusted and rounded.
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Flooring & Tiling
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.
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.