Build calculators

Construction and DIY tools for planning material quantities and project costs.

How much concrete you need for a slab, footing or base, with a reverse mode.

Convert a concrete volume into the number of pre-mixed bags to buy.

How many bricks you need for a wall, with a reverse mode for a fixed brick count.

How many concrete blocks you need for a wall from its area.

How many litres of paint to buy for a wall, ceiling or room.

How many tiles to buy for a floor or wall, with a cutting-waste allowance.

How many packs of laminate, engineered or vinyl flooring to buy for a room.

Plasterboard sheets and skim plaster needed to board and finish a wall or ceiling.

Volume of sand-cement screed needed for a floor, plus an approximate bag count.

A roof's pitch in degrees and as a ratio, from its rise and run.

How many rolls of loft or wall insulation you need for an area.

How many paving slabs you need for a patio, with an allowance for edge cuts.