Clarity65 FREE TOOLS
Construction & home, made clearer.
Plan quantities for concrete, paint, flooring, gardens and home projects using your measurements.
Tools in this category
Concrete Slab Calculator
Estimate concrete volume for a rectangular slab including overage.
Concrete Column Calculator
Estimate concrete for identical round columns.
Strip Footing Concrete Calculator
Estimate concrete volume along a continuous rectangular footing.
Concrete Bag Quantity Calculator
Find bags required using the manufacturer’s mixed yield per bag.
Gravel Quantity Calculator
Estimate bulk gravel mass from area, depth and bulk density.
Sand Calculator — Volume & Extra Allowance
Work out how much sand you need from area, depth and extra allowance. Calculate cubic metres and learn how to convert volume to tonnes.
Mulch Quantity Calculator
Calculate mulch volume for a rectangular garden bed.
Topsoil Calculator — Cubic Metres & Soil Weight
Estimate topsoil volume in cubic metres and mass in kilograms from area, depth and bulk density. Includes a worked example and tonnes conversion.
Tile Quantity Calculator
Find a whole-tile purchasing estimate from area and tile dimensions.
Flooring Boxes Calculator
Estimate whole boxes from floor area and coverage per box.
Paint Quantity Calculator
Estimate liters of paint from net wall area, coats and coverage.
Room Wall Area Calculator
Find net paintable wall area for a rectangular room.
Wallpaper Rolls Calculator
Estimate rolls from wall perimeter, height and usable roll dimensions.
Drywall Sheets Calculator
Estimate sheet count from net surface area and sheet size.
Brick Count Calculator
Estimate facing bricks from wall area, brick face and mortar joint.
Concrete Block Count Calculator
Estimate masonry blocks from wall area and nominal face size.
Paver Count Calculator
Estimate paving units from paved area and nominal unit size.
Fence Post Count Calculator
Estimate posts for a straight, open-ended fence run.
Fence Picket Count Calculator
Estimate full-width pickets along a straight fence.
Deck Board Count Calculator
Estimate rows of full-length deck boards across a deck.
Sloped Roof Area Calculator
Estimate sloped area from horizontal footprint and uniform pitch.
Roof Pitch Calculator
Find a roof angle and rise per twelve units of horizontal run.
Rafter Length Calculator
Find an ideal straight rafter length from rise and horizontal run.
Stair Riser Height Calculator
Divide total vertical rise into an integer number of equal risers.
Stair Total Run Calculator
Estimate horizontal run from tread depth and tread count.
Ramp Slope Calculator
Find grade percentage and slope angle from rise and run.
Board Feet Calculator
Measure lumber volume in board feet from inch dimensions.
Lumber Volume Calculator
Calculate wood volume from board dimensions and quantity.
Rectangular Tank Capacity Calculator
Find internal tank capacity from inside dimensions.
Vertical Round Tank Capacity Calculator
Find liquid capacity of a vertical cylindrical tank.
Pool Volume Calculator
Estimate water volume of a rectangular pool with a uniform depth slope.
Excavation Volume Calculator
Estimate in-place volume of a rectangular excavation.
Excavated Soil Bulking Calculator
Estimate loose volume after excavation from an entered swell factor.
Material Truck Loads Calculator
Estimate trips from total loose volume and permitted load capacity.
Landscape Fabric Rolls Calculator
Estimate rolls of landscape fabric from net area and overlap allowance.
Grass Seed Quantity Calculator
Estimate seed mass from area and the supplier’s sowing rate.
Irrigation Runtime Calculator
Find watering duration from target depth, area and total flow.
Rainwater Harvest Calculator
Estimate collectible roof runoff from rainfall and collection efficiency.
Material Area Cost Calculator
Estimate supply cost from area, waste and price per square meter.
Labor Hours Calculator
Estimate crew labor-hours from quantity and productivity.
Tile Grout Calculator
Estimate grout mass for rectangular tiles from joint dimensions and material density.
Brick Mortar Volume Calculator
Estimate mortar volume by subtracting brick volume from a solid wall volume.
Roof Shingle Bundle Calculator
Estimate shingle bundles using measured sloped roof area and coverage per bundle.
Siding Panel Calculator
Estimate siding panels from net wall area and the exposed coverage of each panel.
Gutter Section Calculator
Estimate stock gutter sections for one continuous run with joint overlap.
Baseboard Trim Calculator
Estimate trim length around a rectangular room after subtracting door openings.
Drywall Joint Compound Calculator
Estimate joint compound containers using supplier coverage for the intended finishing system.
Drywall Tape Calculator
Estimate tape rolls from measured joint length and roll length.
Wall Stud Count Calculator
Estimate regularly spaced studs for one straight wall, with editable extras for framing details.
Deck Joist Count Calculator
Count joist positions across a rectangular layout from maximum spacing.
Rectangular Column Formwork Calculator
Estimate contact formwork area for the four vertical faces of rectangular columns.
Rebar Weight Calculator
Estimate steel reinforcement mass from nominal diameter and total length.
Rebar Grid Quantity Calculator
Count bars in two directions for a rectangular single-layer grid.
Metal Plate Weight Calculator
Estimate mass of a solid rectangular metal plate with an editable density.
Stair Carpet Calculator
Estimate carpet surface area covering rectangular stair treads and risers.
Insulation Roll Calculator
Estimate insulation packs from net coverage area and manufacturer pack coverage.
Blown Insulation Bag Calculator
Estimate loose-fill insulation bags from volume, installed density and bag mass.
Attic Ventilation Area Calculator
Calculate net free ventilation area from attic floor area and a user-specified ratio.
Sod Roll Calculator
Estimate turf rolls and installed material cost from coverage and price per roll.
Retaining Wall Block Calculator
Estimate blocks for a rectangular wall face using exposed block dimensions.
Pond Liner Calculator
Estimate rectangular flexible-liner dimensions from maximum pond dimensions and edge allowance.
Plaster Quantity Calculator
Estimate dry plaster bag count using supplier consumption per square metre per millimetre.
Asphalt Tonnage Calculator
Estimate compacted asphalt mass from paved area, thickness and density.
Sealant Cartridge Calculator
Estimate cartridges needed for rectangular joints using joint length and bead cross-section.
Epoxy Coating Quantity Calculator
Estimate coating volume for a target dry-film thickness and solids-by-volume percentage.
Choosing a tool for construction & home
Measure the actual project, enter supplier yields and choose an explicit waste allowance. Quantity estimates do not replace structural design or local requirements.