Construction Calculators
Estimate common building and renovation quantities from measured dimensions, pack sizes, coverage rates and project-specific waste allowances.
Measure each surface separately, keep units consistent and use the manufacturer's coverage or pack information where available. Calculator quantities are planning estimates; site conditions, layouts, cuts and trade requirements can change the amount ordered.
How to use these calculators well
- Measure each surface or volume separately and keep units consistent.
- Use product-specific pack sizes and manufacturer coverage information.
- Add an allowance suited to cuts, breakage, layout and site conditions.
Concrete Slab Calculator
Calculate concrete volume, wastage-adjusted volume, bags or premix required, estimated cost and approximate weight for any rectangular slab shape.
Open calculatorWallpaper Roll Quantity Calculator
Estimate wallpaper rolls from wall area, roll size, wall height, pattern repeat and allowance, including usable drops per roll.
Open calculatorTile Layout Quantity Calculator
Estimate whole tiles and purchased coverage from net wall or floor area, tile dimensions and an adjustable waste allowance.
Open calculatorFlooring Plank Pack Calculator
Estimate whole packs and purchased coverage for timber, hybrid or laminate flooring from net area, pack coverage and waste.
Open calculatorInsulation Batt Pack Calculator
Estimate insulation batts and whole packs from net ceiling, wall or floor area, batt dimensions, pack quantity and allowance.
Open calculatorLandscape Material Volume Calculator
Estimate cubic metres and tonnes of gravel, mulch or soil from area, placed depth, settlement allowance and supplier bulk density.
Open calculatorLawn Seed Quantity Calculator
Estimate grass seed kilograms and whole bags from lawn area, the selected seed blend's sowing rate and an adjustable allowance.
Open calculatorLawn Turf Roll Calculator
Estimate whole lawn turf rolls and purchased coverage from prepared area, individual roll dimensions and trimming allowance.
Open calculatorPaving Quantity Calculator
Estimate whole pavers, pallet count and purchased face coverage from paved area, paver dimensions, waste and pallet size.
Open calculatorRaised Garden Bed Soil Mix Calculator
Estimate raised garden bed fill volume and two soil-mix component quantities from internal dimensions, fill level and mix ratio.
Open calculatorSwimming Pool Fill Time Calculator
Estimate rectangular pool volume, litres and filling time from pool dimensions, average depth, measured hose flow and loss allowance.
Open calculatorTile Grout Quantity Calculator
Estimate tile grout kilograms and whole bags from tile dimensions, joint geometry, tiled area, grout density and allowance.
Open calculator