Tile Calculator
m² + tile count + adhesive + grout
Reading 3 m
Reading 2.4 m
Reading 250 mm
Reading 400 mm
Reading 10
10% straight lay, 15% diagonal or herringbone.
Reading 2 mm
Reading 8 mm
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What to buy — 5 items
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A free account gets you the Gaffer for the awkward questions, a checklist for the job with every part on a shopping list, and quotes and invoices you can build and price up. Sending them out is Pro. No card needed.
Create your free accountIndicative design aids — the main figures and where each comes from are listed under "Figures based on" below.
Figures based on
- Tiles per m²: Geometry — 1 m² ÷ (tile width × tile height), joints ignored, plus the waste you set
- Waste allowance: No source — workshop estimate, adjust to suit: an input (default 10%)
- Adhesive per 20 kg bag (wall 6 mm notch 6.5 m², floor 10 mm 4 m², solid bed 3 m²) +10%: Typical — no data sheet retrieved. Check the coverage on the adhesive bag for your trowel
- Grout kg/m² = (W + H) × joint × depth × 1.7 ÷ (W × H), +10%: Typical — the usual manufacturer formula with a grout density of 1.7 kg/L. It runs about 30% heavier than BAL's published 6.4 m²/kg for 200 × 200 × 6 mm tiles at 2 mm joints, so it orders on the safe side. Check the grout's data sheet
- 5 kg grout tubs, spacers in packs of 250: No source — common pack size, a fixed estimating assumption
Indicative design aids. A standard is named with its edition; each is still to be checked against the published text. "Typical" means no standard sets it: check the bag, tin, data sheet or supplier named. "No source" means a workshop estimate: adjust to suit, or, where the box says it is fixed, a fixed estimating assumption.