Tools for the work aheadMeasure the job.
Measure the job.
Make every order count.
Practical material calculators for home projects and trade estimates. Plan quantities across rooms, compare supplier packs, and build a shopping list you can actually check.
Plan your project → Find a calculatorFree to use No account needed Browser calculations
A good estimate starts with the right units and the coverage printed on your materials.
One project. A clearer shopping list.
Combine rooms and materials, keep purchase units visible, and download a working estimate.
Open project planner →02 / COMPARECompare the order, not just the pack.
Check coverage, whole packs, delivery and tax before deciding which quote costs less.
Compare supplier quotes →What are you working on?
Browse the tools below.
GroundworkConcrete Calculator →Estimate a rectangular concrete pour in cubic metres, cubic yards and cubic feet.
GroundworkGravel Calculator →Estimate aggregate volume and mass using your supplier’s bulk density.
GroundworkExcavation Calculator →Estimate a rectangular excavation and compare in-situ and loose spoil volume.
SurfacesTile Calculator →Convert net surface area into whole packs using the coverage on your product label.
SurfacesFlooring Calculator →Convert net surface area into whole packs using the coverage on your product label.
SurfacesDrywall Calculator →Convert net surface area into whole sheets using the coverage on your product label.
SurfacesInsulation Calculator →Convert net surface area into whole packs using the coverage on your product label.
SurfacesPaint Calculator →Estimate paint litres and whole tins from your measured area and product coverage.
MasonryBrick Calculator →Estimate bricks for a single wall face with editable brick dimensions and mortar joints.
VolumesPipe Volume Calculator →Calculate the volume of a full circular pipe from its internal diameter.
VolumesWater Tank Calculator →Calculate rectangular tank capacity in litres, US gallons and imperial gallons.
BudgetMaterial Cost Calculator →Estimate one material line including delivery and an optional tax percentage.
SurfacesRoofing Area Calculator →Estimate sloped roof surface area from a rectangular horizontal projection and an entered roof pitch.
GroundworkFence Panel Calculator →Estimate whole fence panels for one straight run after subtracting gate openings.
SurfacesDecking Board Calculator →Estimate stock boards for a rectangular deck with parallel rows and a specified gap.
SurfacesWallpaper Roll Calculator →Estimate wallpaper rolls using full drops, trimming and an optional straight pattern repeat.
SurfacesPlaster Bag Calculator →Estimate whole bags from surface area, specified thickness and the product’s mixed yield.
SurfacesRoom Area Calculator →Calculate floor area, ceiling area and net wall area before choosing flooring or paint quantities.
Know what is behind the number.
Every calculator includes its formula, a worked example and clear limits. Use your own measurements and supplier information, then check the final order against the project plan.
Explore the measurement guides →