About CoverCalc

CoverCalc provides free, accurate construction material calculators for UK projects. Work out exactly how much paint, tiles, wallpaper, concrete, or aggregate you need before you buy.

Why We Built This

We saw too many DIYers and tradespeople either over-ordering (wasting money) or under-ordering (wasting time with second trips to the builders' merchant). Our calculators use industry-standard coverage rates from UK manufacturers and include proper wastage allowances.

What Makes Us Different

• UK-focused: Metric measurements, UK product standards, British manufacturer specs
• Trade-accurate: Coverage rates from Dulux, Crown, and other major brands
• Always free: No registration, no subscription, no hidden costs
• Transparent: Every calculator shows the formula and assumptions used
• Up-to-date: Constants and pricing refreshed regularly (last update: June 2026)

Our Calculators

We currently offer five calculators:

• Paint Coverage Calculator — litres for walls, ceilings, woodwork
• Tile Coverage Calculator — number of tiles and boxes
• Wallpaper Calculator — rolls needed with pattern repeat support
• Concrete Calculator — m³ and bags for slabs and footings
• Aggregate Calculator — tonnes of MOT Type 1, hardcore, gravel

Important Disclaimer

All calculations are estimates for planning purposes. Material requirements vary based on surface condition, application method, and product specifications. For structural work (foundations, load-bearing elements), always consult a qualified structural engineer.

See our full disclaimer for details.

Get in Touch

Questions, corrections, or suggestions? Contact us at [email protected]. We respond to all genuine emails.