UK Building & Construction Calculator

Instant British Standards material calculations: concrete slabs, MOT sub-base, facing bricks, paint coverage, and rebuild costs.

UK Building & Construction Calculator — Free, offline-capable British Standards material estimator for UK homeowners, builders, and quantity surveyors. Quickly calculate material take-offs directly from your browser toolbar without signing up or navigating away from your work. Key Calculators Included: 1. BS 8500 Concrete Slab & Footings: • Calculates total concrete volume in cubic metres (m³) and finished tonnage. • Standard 1:5 ballast-to-cement ratio breakdowns for on-site mixing. • Exact 25kg ballast and 25kg cement bag counts with customisable wastage factors (5%, 10%, 15%). 2. BS EN 771-1 Metric Brickwork & Cavity Walls: • Standard UK metric facing brick counts (215mm x 102.5mm x 65mm). • Single skin garden walls (60 bricks/m²) vs full cavity walls (120 units/m²). • Dry mortar tonnage requirements and 500-brick trade pack estimators. 3. MOT Type 1 Sub-Base (SHW Specification 803): • Sub-base compaction math for driveways, patios, and slab foundations. • 2.2 tonnes/m³ compacted granite/limestone density benchmarks. • Automatic conversion into jumbo 850kg bulk bags. 4. Trade Paint Coverage: • Trade emulsion calculations based on standard 12 m²/Litre rates. • Supports 1, 2, or 3 coats (including mist coats on bare plaster). • Trade 5L and 10L tub recommendations to minimise waste. All formulations are maintained and verified in accordance with current UK Building Regulations and British Standards by BuildingCosts.co.uk. For comprehensive house rebuild cost estimators, RICS reinstatement schedules, and single/double storey extension breakdowns, visit: https://buildingcosts.co.uk