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Concrete slab

Calculate concrete for a rectangular slab, pad or floor.

Concrete Footing

Estimate concrete volume for rectangular strip footings.

Concrete Column

Estimate concrete for circular columns or piers.

Concrete & foundations / Fencing

Post-hole concrete

Calculate concrete around round fence or other posts in round holes.

Concrete Bag

Turn a concrete volume into a whole number of bags.

Excavation volume

Measure a rectangular excavation in cubic units.

Trench volume

Calculate the volume of a constant-width trench.

Backfill quantity

Estimate volume and weight for a rectangular backfill area.

Spoil truckloads

Estimate loads after excavated material expands.

Site slope

Convert a measured rise and run into gradient and angle.

Brick

Estimate facing bricks from wall area and joint size.

Concrete Block

Estimate blocks for a single-leaf wall.

Mortar bags

Convert a known mortar volume into bags.

Render quantity

Estimate render mass from area, thickness and density.

Stone veneer packs

Estimate packs of stone veneer for a measured wall area.

Stud

Estimate regularly spaced studs plus specified extras.

Timber Volume & Board Feet

Calculate solid timber volume and board feet.

Plywood

Estimate sheet quantities for plywood coverage.

Wall plates

Estimate stock timber for plate runs.

Cladding packs

Estimate cladding packs using their effective cover area.

Roof Area

Convert a horizontal footprint into pitched roof area.

Roofing bundles

Estimate roofing bundles from the actual sloping area.

Roof underlay

Estimate underlay rolls with side-lap allowance.

Gutter lengths

Estimate stock gutter lengths for straight runs.

Downpipe lengths

Estimate stock pipe lengths for downpipe runs.

Drywall

Estimate plasterboard sheets after deducting openings.

Joint compound

Estimate joint compound containers from product coverage.

Drywall screws

Estimate screws from your sheet count and fixing schedule.

Ceiling battens

Estimate parallel battens across a ceiling.

Plaster coat

Estimate plaster mass for a constant-thickness coat.

Insulation batt packs

Estimate batt packs from net insulated area.

Rigid insulation boards

Estimate rigid boards from the area to cover.

Insulation rolls

Estimate flexible insulation rolls.

Insulation R-Value

Calculate thermal resistance from thickness and conductivity.

Vapour barrier rolls

Estimate barrier rolls with side overlaps.

Room Paint

Estimate paint for the four walls of a rectangular room.

Paint Coverage

Estimate paint from any measured surface area.

Primer quantity

Estimate primer containers for a prepared surface.

Wallpaper rolls by area

Estimate wallpaper by effective roll coverage.

Tile

Estimate tiles and full boxes for a floor or wall.

Tile grout

Estimate grout mass from joint geometry.

Tile adhesive

Estimate adhesive bags using the selected product rate.

Tile backer board

Estimate boards beneath a tiled surface.

Tile edge trim

Estimate stock edge trims for tiled edges.

Laminate Flooring

Estimate flooring packs with a cutting allowance.

Vinyl Flooring

Estimate vinyl plank or tile packs.

Carpet rolls by area

Estimate carpet roll quantities by total area.

Floor underlay

Estimate underlay rolls from the floor area.

Floor levelling compound

Estimate levelling compound from average applied depth.

Decking

Estimate full-length board rows across a deck.

Deck joists

Estimate joists from a specified centre spacing.

Deck fixings

Estimate screws from board-to-joist intersections.

Decking & outdoor timber / Painting & decorating

Deck coating

Estimate deck oil, stain or coating from measured surface area and product coverage.

Deck fascia

Estimate fascia stock lengths around deck edges.

Fence posts & rails

Estimate posts and rails for one straight fence run.

Fence pickets

Estimate pickets from width and spacing.

Fence wire

Estimate wire rolls for multiple strands.

Fence coating

Estimate paint or stain for a fence.

Topsoil

Estimate topsoil volume and delivered weight.

Mulch

Estimate mulch volume and weight.

Turf rolls

Estimate turf rolls for a measured lawn area.

Soil Volume

Estimate soil for a rectangular raised bed.

Landscape fabric

Estimate fabric rolls with overlapping seams.

Pipe water capacity

Calculate the liquid held inside a circular pipe.

Pipe flow from velocity

Convert pipe diameter and average velocity into flow.

Tank fill time

Estimate the time to fill a tank at a known flow rate.

Drain fall & gradient

Calculate the gradient of a measured drain run.

Pipe stock lengths

Estimate straight pipe stock from total run lengths.

Electrical power

Calculate power from voltage and current.

Current from power

Calculate current for a known power and voltage.

Ohm’s law

Calculate current and power in a resistive circuit.

Energy use

Estimate energy consumption from power and running time.

Cable length

Estimate cable stock from measured routes.

Airflow for air changes

Convert a specified air-change target into required airflow.

Round duct surface

Estimate sheet or wrap area around a straight round duct.

Rectangular duct surface

Estimate the four-sided surface of a rectangular duct.

Round duct air velocity

Calculate average velocity from airflow and diameter.

Duct wrap rolls

Estimate insulation wrap from measured duct surface area.

Glass weight

Estimate glass mass from dimensions and thickness.

Glazing sealant

Estimate cartridges for rectangular glazing joints.

Window trim

Estimate trim around rectangular window openings.

Weatherstripping

Estimate weatherstrip length around rectangular openings.

Joinery panels

Estimate sheet material for measured joinery faces.

Liquid membrane

Estimate liquid membrane from specified coverage and coats.

Sheet membrane rolls

Estimate sheet membrane rolls with side laps.

Waterproofing primer

Estimate primer for a waterproofing substrate.

Joint sealant

Calculate sealant volume and cartridge quantities.

Flashing lengths

Estimate stock flashing lengths.

Paver

Estimate pavers and full packs for a measured area.

Gravel & Road Base

Estimate aggregate volume and mass for a paving base.

Sand

Estimate sand volume and weight beneath paving.

Asphalt

Estimate asphalt mass from finished dimensions.

Joint spacing layout

Count internal joints and equal panels along one span.

Material cost

Estimate material cost with an optional contingency.

Labour cost

Estimate labour cost from crew size and time.

Profit margin

Calculate a selling price from a target gross margin.

Markup

Calculate selling price by adding a markup to cost.

Tax on an estimate

Add a user-specified tax rate to a subtotal.