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Materials calculators
Quantity calculators for trades and self-builders. Tell us the dimensions and we will tell you what to order, how much of it, and roughly what it costs.
Brick Calculator
Work out how many bricks you need for any wall, plus packs, sand and cement, with 2026 Northern Ireland brick and bricklaying prices and full workings.
Concrete Calculator
Work out how much concrete you need for a slab, footing or post holes, with cement, sand and aggregate quantities and 2026 Northern Ireland prices.
Fencing Calculator
Work out how many fence panels, posts, gravel boards and postmix bags you need, plus installed cost at 2026 Northern Ireland rates. Free calculator.
Other calculators
Extensions
Single storey, double storey, rear, side and wrap-around
Loft & Conversions
Lofts, garages, garden rooms and outbuildings
Insulation & Energy
Loft, wall, floor and roof insulation with U-value modelling
Driveways & Outside
Driveways, patios, decking and garden walls
Renovation
Kitchens, bathrooms, roofs, windows and rewires