All Construction & DIY Calculators
Browse our complete collection of 55 free calculators for construction, renovation, and DIY projects. Every tool supports both Imperial and Metric units with adjustable waste factors.
Browse by Category
Flooring & Tiling(3)
Walls & Interior(7)
Countertop Calculator
Calculate the area and cost estimate for kitchen or bathroom countertops.
Paint Calculator
Calculate how much paint you need for walls, ceilings and trim based on room dimensions.
Drywall / Plasterboard Calculator
Calculate the number of drywall sheets, joint compound, tape, and screws needed.
Insulation Calculator
Calculate the amount of insulation rolls, batts, or boards needed for walls, floors and lofts.
Wallpaper Calculator
Calculate the number of wallpaper rolls needed for any room, accounting for pattern repeat.
Crown Molding / Coving Calculator
Calculate crown molding or coving length, number of pieces, inside and outside corners for any room.
Baseboard / Skirting Board Calculator
Calculate baseboard or skirting board length needed for any room, accounting for doorways and corners.
Concrete & Masonry(11)
Concrete Calculator
Calculate how much concrete you need for slabs, footings, columns and walls in cubic yards or metres.
Brick Calculator
Calculate the number of bricks and mortar needed for any wall or project.
Mortar Calculator
Estimate mortar volume and cement, lime, sand quantities for bricklaying and blockwork.
Concrete Block / CMU Calculator
Calculate the number of concrete blocks or CMUs needed for a wall plus mortar requirements.
Rebar Calculator
Calculate the number of rebar pieces, total length, and weight for slabs, footings, and walls.
Paver Calculator
Calculate how many pavers and how much sand and gravel you need for patios, walkways and driveways.
Foundation Calculator
Calculate concrete, rebar, and formwork needed for strip, pad, or raft foundations.
Grout Calculator
Calculate the amount of grout needed for tiling based on tile size, spacing, and area.
Post Hole Calculator
Calculate concrete and gravel needed for setting fence or deck posts in the ground.
Cement Calculator
Calculate the number of cement bags, sand and aggregate needed for a concrete or mortar mix by ratio.
Screed Calculator
Calculate floor screed volume plus sand and cement quantities for any floor area and thickness.
Roofing & Structural(12)
Roofing Calculator
Calculate roofing materials including shingles, underlayment, and ridge caps for your roof.
Roof Pitch Calculator
Find the pitch, angle, and slope of your roof from rise and run measurements.
Rafter Calculator
Calculate rafter length, birdsmouth cut, ridge height and tail length for common rafters.
Staircase / Stair Calculator
Calculate rise, run, number of steps, stringer length, and headroom for any staircase.
Lumber / Timber Calculator
Calculate board feet, linear feet, and total lumber or timber needed for framing and woodworking projects.
Deck Calculator
Calculate decking boards, joists, posts, and hardware for building a deck.
Stud Spacing / Framing Calculator
Calculate the number of studs and framing materials needed for wall construction.
Joist Calculator
Calculate the number of joists, hangers, and blocking needed for floors and ceilings.
Beam / Load Calculator
Calculate beam size requirements, maximum span, and load capacity for structural beams.
Timber / Lumber Fastener Spacing Calculator
Calculate the number and spacing of nails, screws, or bolts needed for timber and lumber connections.
Deck Board Calculator
Calculate how many deck boards you need based on deck size, board width and the gap between boards.
Deck Joist Spacing Calculator
Calculate the number of deck joists, spacing and total joist length for your decking frame.
Landscaping & Outdoor(16)
Gravel Calculator
Calculate the volume and weight of gravel needed for driveways, paths, and landscaping.
Mulch Calculator
Calculate the volume of mulch needed for garden beds, paths, and landscaping areas.
Topsoil Calculator
Calculate the volume of topsoil needed for raised beds, lawns, and garden projects.
Sand Calculator
Calculate the volume and weight of sand needed for levelling, filling, and construction.
Sod / Turf Calculator
Calculate how many rolls or pallets of sod/turf you need for your lawn.
Fence Calculator
Calculate posts, rails, pickets and concrete needed for building a fence.
Asphalt Calculator
Calculate the tonnage of asphalt needed for driveways, roads and parking areas.
Excavation Calculator
Calculate the volume of soil to excavate and the number of skip loads or truck loads needed.
Retaining Wall Calculator
Calculate blocks, backfill gravel, and drainage materials for a retaining wall.
Driveway Calculator
Calculate materials for a new driveway including sub-base, base, and surface course.
Fence Post Spacing Calculator
Calculate how many fence posts you need and the exact spacing between them for any fence run.
Fence Panel Calculator
Calculate how many fence panels, posts and gravel boards you need for your fence line.
MOT Type 1 Calculator
Calculate how much MOT Type 1 sub-base aggregate you need in tonnes and cubic metres.
Crushed Stone Calculator
Calculate the volume and weight of crushed stone needed for driveways, paths and drainage.
Aggregate Calculator
Calculate the tonnage and volume of any aggregate – gravel, sand, ballast, MOT or crushed stone.
Hardcore Calculator
Calculate how much hardcore fill you need in tonnes and cubic metres for foundations and sub-bases.