Good jobs start
with a clear plan.
From the first measurement to the final margin. 66 practical calculators for homeowners and the businesses that get it done.
What are you working on?
66 calculators available.
Plan your project
Quantities, geometry and scenarios for the trades involved.
Concrete volume & budget
Work out slab volume, an order allowance and your installed budget.
Open calculator PaintingPaint quantity
Plan paint litres from surface area, coats and product coverage.
Open calculator FlooringFlooring quantity & budget
Calculate coverage, whole packs and a material-plus-labour budget.
Open calculator TilingTiling quantity & budget
Calculate coverage, whole packs and a material-plus-labour budget.
Open calculator FencingFencing budget
Compare your per-metre quotes with gates, removal and fixed costs.
Open calculator CarpentryDecking budget
Build a planning range using measured area and your own installed rates.
Open calculator LandscapingPaving budget
Build a planning range using measured area and your own installed rates.
Open calculator RoofingRoofing budget
Build a planning range using measured area and your own installed rates.
Open calculator CarpentryCladding budget
Build a planning range using measured area and your own installed rates.
Open calculator RoofingGuttering budget
Estimate a linear installation budget with downpipes and extras.
Open calculator ConcretingConcrete footings & columns
Estimate concrete for rectangular footings or circular columns.
Open calculator ConcretingBagged concrete
Convert required concrete volume into whole bags using product yield.
Open calculator BricklayingBrick & block quantities
Estimate units from wall area, unit dimensions and mortar joints.
Open calculator BricklayingMortar bag coverage
Budget mortar bags from a confirmed product coverage rate.
Open calculator PlasteringPlasterboard sheets
Estimate whole sheets or packs using the coverage on your selected product.
Open calculator InsulationInsulation packs
Estimate whole sheets or packs using the coverage on your selected product.
Open calculator CarpentryCladding sheets
Estimate whole sheets or packs using the coverage on your selected product.
Open calculator CarpentryDecking board quantities
Estimate rows and full-length boards for a straight rectangular deck.
Open calculator CarpentryTimber volume & lineal metres
Convert a timber schedule to volume and a supply budget.
Open calculator RoofingRoof pitch & slope geometry
Convert known rise and horizontal run into angle and slope length.
Open calculator CarpentrySquare-up & diagonal
Check the target diagonal for a rectangular set-out.
Open calculator PlumbingFall & gradient
Calculate vertical fall from a run and an entered gradient.
Open calculator TilingTile grout quantity
Estimate grout mass from tile size, filled joint depth and product factor.
Open calculator TilingTile adhesive bags
Estimate product packs from the manufacturer’s total application consumption.
Open calculator WaterproofingWaterproofing product quantity
Estimate product packs from the manufacturer’s total application consumption.
Open calculator RenderingRender bags
Estimate product packs from the manufacturer’s total application consumption.
Open calculator TilingFloor levelling compound
Estimate levelling compound from area, average thickness and product yield.
Open calculator WaterproofingSealant cartridges
Estimate cartridges for rectangular joints or triangular fillets.
Open calculator LandscapingSoil, mulch & gravel volume
Calculate loose material volume, bags and a supplied-density weight estimate.
Open calculator LandscapingTurf rolls & slabs
Plan whole turf units, coverage and a supply budget.
Open calculator EarthworksExcavation & spoil volume
Estimate in-situ excavation and loose spoil using an entered bulking factor.
Open calculator PlumbingRainwater event capture
Estimate roof runoff from one rainfall event and available tank storage.
Open calculator PlumbingPipe water volume
Estimate water held in a straight pipe using its internal diameter.
Open calculator PlumbingFlow & water-use budget
Convert a measured flow rate and use duration into litres and water cost.
Open calculator Electrical & energyAppliance running cost
Estimate electricity consumption from input power, run time and your tariff.
Open calculator Electrical & energyAppliance energy comparison
Compare annual labelled energy consumption and simple extra-cost payback.
Open calculator Electrical & energySolar savings scenario
Explore savings using your installer’s generation and self-use assumptions.
Open calculator HVACVentilation air-change conversion
Convert measured airflow and room volume to air changes per hour.
Open calculator CarpentryStraight stair geometry
Check geometric rise, going and pitch for a specified straight flight.
Open calculator FencingEqual slat & panel spacing
Find equal clear gaps between an entered number of items.
Open calculator CarpentryStraight wall stud take-off
Count regular studs and plates for a simple uninterrupted wall.
Open calculator CarpentrySkirting & cornice stock lengths
Convert a measured trim run into a minimum stock-length allowance.
Open calculator RoofingRectangular roof sheet quantities
Count full-length sheets using the selected profile’s effective cover.
Open calculator CarpentrySpecified fastener pack quantities
Turn a fixing schedule into purchasable packs.
Open calculator CabinetmakingCabinet panel edge tape
Total selected straight panel edges and roll quantities.
Open calculator CabinetmakingIdentical rectangular panel sheet yield
Compare two uniform panel orientations on a rectangular sheet.
Open calculator GlazingGlass pane mass
Estimate plain glass mass from dimensions and supplier density.
Open calculator Metal fabricationMetal plate & flat-bar mass
Estimate solid rectangular material mass using an entered density.
Open calculator Metal fabricationRound tube nominal mass
Calculate material volume for a round hollow section.
Open calculator Pools & spasRectangular pool water volume
Estimate water volume between entered water-surface dimensions.
Open calculator IrrigationIrrigation precipitation & runtime
Convert measured zone flow to average application and target-depth runtime.
Open calculator IrrigationDrip emitter water use
Total specified emitter flow and water used over a run.
Open calculator CleaningCleaning solution dilution
Mix a labelled concentrate-to-water ratio by volume.
Open calculator CleaningCleaning time & labour budget
Budget work from your measured productivity and hourly rate.
Open calculator Demolition & wasteNon-hazardous waste disposal loads
Compare volume and mass limits for entered loose waste.
Open calculator HVACDuct area & measured air velocity
Convert measured air volume into average round-duct velocity.
Open calculator PaintingWallpaper rolls for one wall
Plan full drops for straight-match wallpaper on a rectangular wall.
Open calculator General buildingPrinted plan scale conversion
Convert a measured paper distance using the printed ratio.
Open calculator General buildingTriangle & trapezoid area
Calculate a measured trapezoid or triangle using parallel bases.
Open calculator General buildingCircle area & perimeter
Measure circular coverage for garden, flooring and site planning.
Open calculatorMake the numbers work
Price with purpose and keep your business moving.
Charge-out rate
Turn annual income, overheads and billable time into an hourly target.
Open calculator Trade businessJob profit margin
See profit, margin and markup without mixing up the percentages.
Open calculator Trade businessMaterials markup
Price materials with a markup and see the resulting gross margin.
Open calculator Trade businessAustralian GST
Add GST to a taxable price or extract it from an inclusive amount.
Open calculator Trade businessEmployee cost budget
Budget wages, super contributions and your other employment costs.
Open calculator Trade businessThree-month cash flow
Forecast cash balances and spot a funding gap before it arrives.
Open calculatorPlanning numbers, with context.
Project costs use your entered rates. Coverage, density, yield and tariff examples are starting inputs, not product specifications or market averages. Each page explains measurements, maths, assumptions and the next step.