Accurate material volumes, trade cost estimates, and statutory BS 7671 & Building Regs compliance for UK homeowners, builders, and makers.
Calculate cubic metres of concrete, bags of cement, sharp sand, and 20mm ballast for patio and garage slabs.
Open Calculator →Compute the exact number of standard 215x102.5x65mm UK bricks and sand/cement mortar bags for single and double skin walls.
Open Calculator →Determine safe joist depth and centres (400mm / 600mm) for domestic suspended timber floor and flat roof spans.
Open Calculator →Estimate CLS 38x89mm timber studs, noggins, and 12.5mm tapered edge plasterboards needed for internal room dividers.
Open Calculator →Calculate square metres, box quantities, adhesive buckets, and joint grout weight with cut wastage allowances.
Open Calculator →Model PV generation based on roof pitch, UK geographic latitude, orientation (South/East/West), and Smart Export Guarantee (SEG).
Open Calculator →Compare electricity per kWh at COP 3.2 against gas boiler 90% condensing efficiency and calculate annual fuel bill delta.
Open Calculator →Calculate mineral wool thermal resistance, upgrading from 50mm to recommended 270mm UK Part L standard, and energy savings.
Open Calculator →Determine Twin & Earth (T&E) copper conductor size (1.5mm² to 16mm²) ensuring voltage drop stays below statutory 3% (lighting) and 5% (power).
Open Calculator →Verify maximum demand, Type A / Type B 30mA RCD, and 6mm² or 10mm² SWA armoured cable sizing for outdoor wallbox chargers.
Open Calculator →Compute radiator heat loss for living rooms and bedrooms based on room volume, double glazing, exterior walls, and ΔT50 flow temperatures.
Open Calculator →Estimate 16mm Pert-Al-Pert pipe coils, 150mm/200mm pipe centres, and loop counts for screed and timber floor overlays.
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