Construction & home
Paint, tiles, concrete, heating and other building material calculators.
13 tools in this category
Quantity take-offs for the jobs people actually do themselves: paint for a room, tiles and laminate for a floor, concrete for a slab, bricks for a wall, and the firewood or electricity a winter costs. Every calculator asks for the dimensions you can measure with a tape, works in the units materials are sold in, and rounds up to whole bags, boxes and packs — because a shop will not sell you 4.3 boxes of tiles. Where a figure is a convention rather than a law (bag yields, waste allowances, wood densities) the page says so and lets you change it, and the waste margin is always visible rather than hidden inside the result. Nothing here replaces a structural calculation or a quote from someone who has seen the site.
Area Calculator
Calculate the area of a rectangle, square, circle, triangle or trapezoid in m², cm² and square feet. Runs in your browser.
Construction & home
Paint Calculator
Work out how many litres of paint you need from wall area, coats and coverage. Runs in your browser.
Construction & home
Tile Calculator
Work out how many tiles you need from the area, tile size and a waste margin. Runs in your browser.
Construction & home
Laminate Flooring Calculator
Work out how many packs of laminate or flooring you need from the room area and pack coverage. Runs in your browser.
Construction & home
Brick Calculator
Work out how many bricks or blocks a wall needs from its area, the brick face size, mortar joint and a waste margin.
Construction & home
Concrete Calculator
Work out concrete volume for a slab or footing in m³ and litres, plus an estimate of 25 kg bags. Runs in your browser.
Construction & home
Cubic Meter Calculator
Calculate volume in cubic metres from length, width and height, for any quantity of items — also shown in litres and cubic feet.
Construction & home
Wallpaper Calculator
Find how many rolls of wallpaper a room needs from its wall length, ceiling height, roll size and pattern repeat.
Construction & home
Firewood Volume Calculator
Turn a stacked cubic metre into solid wood, mass, kWh of heat and cost per kWh by species.
Construction & home
Roof Area Calculator
Estimate the sloped surface area of a pitched roof from the building footprint and roof pitch, with a waste margin for materials.
Construction & home
Air Conditioner BTU Calculator
Estimate the cooling BTU and heating power a room needs from its size and conditions. A rough sizing guide.
Construction & home
Fence Calculator
Estimate fence posts, sections, rails and pickets for a straight run from its length, post spacing and picket size.
Construction & home
Tank Volume Calculator
Find the volume of a cylindrical or rectangular tank in litres, cubic metres and gallons from its dimensions.
Construction & home