Work out exactly how much to buy — with the waste factors the trades actually use — and what it should cost in 2026, in metric units and pounds. Free, instant, and nothing you enter is stored.
Cubic metres, bags of mix, and cost for slabs, footings, and bases.
Open calculator →Tonnes, cubic metres, bulk bags and cost of gravel for drives, paths and borders.
Open calculator →Litres, cubic metres, bulk bags and cost of bark mulch for beds and borders.
Open calculator →Litres of paint and primer for walls and ceilings, by area and coats.
Open calculator →Boards, screws, jointing compound and scrim for walls and ceilings.
Open calculator →Boards, linear metres and cost for softwood or composite decks.
Open calculator →Panels, posts, postcrete and cost for panel fencing by the metre.
Open calculator →Square metres of tile, adhesive, grout and cost for walls and floors.
Open calculator →Rolls of wallpaper by wall area and pattern repeat.
Open calculator →Depth, U-value and cost of loft insulation by area and material.
Open calculator →Litres of resin for garage floor coatings and deep pours.
Open calculator →Rolls of turf and cost to returf a lawn, by area.
Open calculator →We're localising the full set of calculators for the UK — metric units, £ pricing from current UK cost data, and copy written for how the trades work here. The concrete calculator is live; more are on the way. Need one now? The full set (US units) covers all twelve materials.
