Calculators
Construction calculator catalogue
Browse complete construction quantity calculators by category, or search for a specific task.
For example paint, drywall or insulation packs.
No matches. Try a shorter phrase or clear the search.
Browse categories
Geometry
Room, wall and volume measurements with explicit purchase rounding.
Concrete and foundations
Concrete volume and packaged-mix purchasing tools for measured rectangular placements.
Concrete slab calculatorEstimate concrete volume for a rectangular slab with explicit order allowance.Concrete bag calculatorCalculate complete bags from placement volume and product-specific mixed yield.Concrete column volumeVolume for entered rectangular or circular column geometry, quantity and order allowance.Concrete footing volumeConcrete quantity for user-entered rectangular or circular footing geometry; no bearing check.Multi-placement concrete volumeSum named rectangular and circular placements with allowance and optional label yield per bag.Masonry element quantityCount blocks or bricks and whole packages from net wall area and product consumption per square metre.
Siteworks and fencing
Measured fence runs, trench excavation and aggregate quantities without system or earthworks design.
Fence panels and postsWhole panels and posts for independent straight runs using entered system bay spacing.Fence mesh rollsComplete mesh rolls for measured runs with explicit deductions, allowance and roll overlap.Trench excavation volumeIn-situ geometric volume for a list of constant-section trench segments.Aggregate volumePlanned aggregate volume from measured area, target layer depth and explicit allowance.Aggregate massAggregate mass from volume and supplier bulk density entered from current product data.
Roof materials
Quantity-only tools for roofing covering packages, tiles, battens and underlayment rolls.
Roof covering packagesWhole roof-covering packages from entered measured area, coverage and allowance.Roof tilesTile and full-pack quantities from entered roof area and product coverage data.Roof battensBatten rows and stock lengths from entered slope length, gauge and roof width.Roof underlayment rollsWhole underlayment rolls from entered roof area, roll coverage and allowance.
Thermal insulation
Calculate R-value, U-value, insulation thickness, dew point and whole insulation packs with clear SI and US units.
Dew point calculatorCalculate air dew point from temperature and humidity, and compare it with a separately measured surface temperature.Layered thermal resistanceNominal R and U for entered homogeneous layers.Insulation thickness calculatorCalculate insulation thickness in mm and inches from your target RSI or US R-value and product lambda, k-value or R per inch.R-value calculator: thickness and conductivityCalculate insulation R-value from thickness and lambda, US k-value or R per inch. Enter mm, metres, inches or feet and compare RSI with US R.R-value to U-value calculatorConvert R-value to U-value or U-factor and back. Compare US and SI units, RSI, formulas and worked examples.Insulation packsFull insulation packs from measured area, layer count, coverage and allowance.
Interiors and drywall
Published tools and reviewed guidance for interior wall board calculations.
Drywall board calculator for wallsCalculate boards for rectangular walls, openings, layers, waste, packages and optional cost.Room paint calculatorCalculate paint containers for walls, openings, ceiling, coats and label coverage.Paint surface calculatorCalculate paint litres and containers from net area, coats, product coverage and allowance.Drywall studs and tracksEstimate wall studs and tracks from wall dimensions, stud spacing and stock lengths.Drywall ceiling profilesEstimate ceiling profiles and hangers from room dimensions and the specified system spacing.Suspended ceiling tilesEstimate suspended ceiling tiles and cartons from ceiling area, tile size and allowance.Ceiling perimeter trimCalculate ceiling perimeter trim pieces from room dimensions, stock length and allowance.Plaster quantityCalculate plaster mass and whole bags from area, thickness and the product's stated consumption.Skim coat quantityEstimate skim coat mass and bags using area, application basis and product consumption.Wallpaper rollsCalculate wallpaper rolls from complete drops, wall height, roll dimensions and pattern repeat.Drywall joint compoundEstimate drywall joint compound mass and packages from board area and product consumption.Drywall screwsEstimate drywall screws and boxes from boarded area, layers and specified screw consumption.Material purchase costEstimate whole packages, surplus and total purchase cost from your quantity and supplier price.
Floors and tiles
Tiles, grout, adhesive, panels and baseboard purchase quantities from product-specific coverage.
Tile calculatorCalculate tiles and complete boxes from area, tile size and waste.Grout calculatorCalculate grout mass and complete bags from manufacturer consumption.Tile adhesive calculatorCalculate adhesive mass and complete bags from product and trowel consumption.Floor panel calculatorCalculate flooring area, waste and complete packs from product coverage.Baseboard calculatorCalculate perimeter, waste and whole stock lengths of baseboard.