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Home tools

Home and DIY Calculators

Estimate paint, flooring, concrete, room measurements and project quantities before buying materials.

8 calculators4 guides

Home and DIY calculators turn rough measurements into a better buying plan. Real rooms still need allowance for cuts, coverage variation, waste and the way materials are sold.

Measure carefully, add a sensible margin and round quantities in line with pack sizes. That gives you a result that is practical for ordering, not just mathematically neat.

8 calculators

Estimate room measurements, materials and project quantities before you buy supplies or book work.

HomePaintEstimate litres of paint needed from wall area, coats and paint coverage.HomeTilesEstimate how many tiles are needed for a floor or wall, including waste.HomeFlooringEstimate flooring packs from room dimensions, pack coverage, extra area and waste allowance.HomeConcreteEstimate concrete volume for slabs, footings and simple rectangular pours.HomeRoof PitchCalculate roof pitch, angle and slope factor from rise and run for roofing, planning and material estimates.HomeBTUEstimate room heating output in BTU per hour from room size and insulation.HomeMoving BoxesEstimate how many moving boxes you may need for a house move, based on rooms, belongings and packing style.HomeWallpaperEstimate wallpaper rolls from wall dimensions, openings, roll size and waste allowance.

Guides

Useful reading for home questions

Read the background, then move straight into the linked calculators when you need a result.