Construction & DIY Calculators

Calculate how much concrete you need in cubic metres or bags for slabs, footings, posts and columns.

Calculate how much paint you need based on wall area, number of coats and paint coverage rate.

Calculate how much laminate, vinyl or carpet you need including wastage. Get pack and cost estimates.

Calculate how many tiles you need for walls or floors. Accounts for grout gaps and wastage.

Calculate gravel needed in cubic metres, tonnes or bags for driveways, paths and landscaping.

Calculate how many rolls of wallpaper you need. Accounts for pattern repeat and doors/windows.

Calculate decking boards, joists and screws needed. Get material cost estimates.

Calculate fence panels and posts needed for your garden fence with material cost estimates.

Calculate the BTU and wattage needed for your radiators based on room size, glazing and insulation.

Calculate bricks, sand and cement needed for walls. Accounts for openings and mortar joints.

Compare loft, cavity wall, solid wall and floor insulation costs, savings and payback periods.

Calculate roof tiles, ridge tiles, batten and felt needed based on roof dimensions and pitch.

Calculate plaster needed in 25kg bags for skim coat, bonding/browning or one-coat plaster.

Calculate risers, treads, pitch and going for a staircase. Checks Building Regulations Part K compliance.

Estimate loft conversion costs by type (Velux, dormer, hip-to-gable, mansard). See ROI and value added.

Estimate home extension costs per m² for single/double storey, side return and wrap-around extensions.

Estimate bathroom renovation costs for budget, mid-range and premium finishes with optional extras.

Estimate kitchen installation costs by budget level. Includes units, worktops, appliances and labour.

Calculate timber volume, total length and cost for construction projects. Common size presets included.

Compare water, electric mat and cable underfloor heating. See install costs and running costs vs radiators.