Practical numbers for real building work
Free · no sign-upMetric & imperial

Free calculators for concrete, tile, brick, drywall, paint, roofing, insulation and electrical planning.

Paver Calculator
Calculator

Paver Calculator

Calculate paved area, cutting allowance and whole pavers from project dimensions and individual paver size.

Carpet Calculator
Calculator

Carpet Calculator

Calculate room area, the number of carpet strips and the linear roll length needed for installation.

Sand Calculator
Calculator

Sand Calculator

Estimate sand volume and mass for bedding, filling or landscaping from dimensions, depth and bulk density.

Gravel Calculator
Calculator

Gravel Calculator

Calculate gravel volume and approximate tonnes from area, layer depth, bulk density and delivery allowance.

Baseboard Calculator
Calculator

Baseboard Calculator

Calculate net wall length, cutting allowance and whole baseboard pieces after subtracting doorways.

Tile Adhesive Calculator
Calculator

Tile Adhesive Calculator

Estimate tile adhesive weight and whole bags from tiled area, product consumption and waste allowance.

Floor Screed Calculator
Calculator

Floor Screed Calculator

Calculate screed area, dry-mix weight and whole bags from floor size, thickness and consumption rate.

Wall Putty Calculator
Calculator

Wall Putty Calculator

Estimate finishing putty weight and whole bags from surface area, coat thickness and label consumption.

Wall Plaster Calculator
Calculator

Wall Plaster Calculator

Estimate dry plaster weight and whole bags from wall size, layer thickness and product consumption.

Wallpaper Calculator
Calculator

Wallpaper Calculator

Calculate wallpaper drops and whole rolls from wall perimeter, ceiling height, openings and pattern repeat.

Bathroom Tile Calculator
Calculator

Bathroom Tile Calculator

Calculate floor tile, wall tile and full boxes for a bathroom from room size and tiled wall height.

Insulation Calculator
Calculator

Insulation Calculator

Calculate insulation area, material volume and full packs from surface size, thickness and pack coverage.

Roofing Calculator
Calculator

Roofing Calculator

Estimate sloped roof area and material units from plan dimensions, pitch, coverage and waste.

Paint Calculator
Calculator

Paint Calculator

Estimate wall area, paint litres and primer from room dimensions, openings, coats and coverage.

Drywall Calculator
Calculator

Drywall Calculator

Calculate net wall area, full drywall sheets and a practical screw allowance for a room.

Tile Calculator
Calculator

Tile Calculator

Estimate tile quantity and full boxes from surface size, tile dimensions and cutting waste.