All calculators
Search 25 construction calculators by name or filter them by category. Every calculator shows the answer, the supporting values and the quantity to actually buy.
25 calculators found
Tile Calculator
Estimate how many tiles a floor or wall needs, including a waste allowance for cuts, breakage and future repairs.
CalculatorsPaint Calculator
Work out how much paint a room needs from the wall area, the coverage printed on the tin and the number of coats you plan to apply.
CalculatorsWallpaper Calculator
Estimate how many rolls of wallpaper a room needs from the wall area, the roll size and an allowance for pattern matching.
CalculatorsLaminate Calculator
Calculate how many packs of laminate to buy for a room, based on the floor area, the coverage printed on the pack and a cutting allowance.
CalculatorsConcrete Calculator
Work out the volume of concrete a slab needs, in cubic metres or cubic yards, before you order from the plant.
CalculatorsParquet Calculator
Plan a parquet floor purchase: the calculator returns the required area, individual plank count and whole packs to order.
CalculatorsFloor Area Calculator
Get the floor area, perimeter and waste-adjusted area for a room. These three numbers feed almost every other flooring and renovation calculator.
CalculatorsSkirting Board Calculator
Work out the skirting board length for a room, deduct door openings and convert the result into whole pieces to buy.
CalculatorsSelf-Levelling Compound Calculator
Estimate how much self-levelling compound you need to level a floor, and how many bags that is.
CalculatorsFloor Screed Calculator
Estimate screed volume and the mass of material needed for a floor, based on area, layer thickness and density.
CalculatorsPlaster Calculator
Calculate how much plaster or render a wall needs, based on the net wall area, the layer thickness and the consumption printed on the bag.
CalculatorsWall Putty Calculator
Estimate filler and skim coat quantities for a wall from its area, the coat thickness and how many coats you will apply.
CalculatorsWall Area Calculator
Get the wall area of a room with doors and windows deducted. This is the number that paint, wallpaper, plaster and putty calculators all build on.
CalculatorsDrywall Calculator
Estimate how many plasterboard or drywall sheets a wall or ceiling needs, including a cutting allowance.
CalculatorsBrick Calculator
Estimate how many bricks a wall needs, taking the mortar joint and wall thickness into account, and see the volume of brickwork involved.
CalculatorsBlock Calculator
Estimate block quantities for a wall, whether you are using lightweight concrete blocks, aerated blocks or dense masonry units.
CalculatorsCement Mortar Calculator
Work out how much cement and sand a mortar mix needs for brickwork or blockwork, based on the wall volume and your ratio.
CalculatorsRebar Calculator
Estimate how much reinforcement a slab needs: how many bars run each way, the total length to buy and the weight of steel involved.
CalculatorsFoundation Calculator
Estimate the concrete volume for a strip foundation and any slab or pad footings in the same run.
CalculatorsRoof Area Calculator
Convert a building footprint into the true sloped roof surface area you actually have to cover.
CalculatorsRoofing Sheet Calculator
Work out how many profiled sheets, panels or tiles you need to cover a roof, allowing for side and end laps.
CalculatorsInsulation Calculator
Work out how much insulation you need for a wall, ceiling or floor, and how many packs that is.
CalculatorsFence Calculator
Work out the number of posts and panels for a fence run, allowing for gates and a waste margin.
CalculatorsRoom Area Calculator
Get the four basic numbers for a room — floor area, ceiling area, perimeter and volume — from one set of measurements.
CalculatorsRoom Renovation Calculator
The flagship calculator: enter a room once and get every renovation material quantity at the same time — floor, walls, paint, wallpaper, laminate and skirting.
Calculators
Results are material quantity estimates only. They are not structural design, and they are not a substitute for local building codes, engineer approval or manufacturer instructions.