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94 free calculators built the way tradespeople actually estimate: real stock sizes, bag yields and waste allowances. Every result drops into a job, and every job turns into a client-ready quote.
Calculators by trade
See all 94 →Concrete & Masonry18
Slabs, footings, bricks, blocks, mortar, pavers, retaining walls
Carpentry & Framing6
Roof trusses, timber volume, sheet material, trim, mitre angles
Roofing5
Roof area, pitch, tiles, IBR sheeting, gutters
Walls & Finishes8
Drywall, brandered ceilings, plaster, insulation, paint, cladding
Flooring & Tile7
Flooring, tile, grout, adhesive, carpet, epoxy, screed
Decking & Fencing4
Deck boards, stain, palisade and diamond mesh fences
Stairs, Ramps & Rails3
Stair geometry, ramps, balusters
Landscaping & Earthworks12
Mulch, stone, sand, soil, lawn, digging, pools
Plumbing & Water8
Pipe volume, drain fall, tanks, flow rate
Electrical & Lighting6
Voltage drop, Ohm’s law, electricity cost, downlights
Aircon & Cooling1
Aircon sizing in BTU
Measure & Convert8
Area, volume, angles, units, material weight
Pricing & Business8
Markup, labour rate, job costs, VAT, travel
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Pick a calculator, enter your measurements in feet-and-inches or metric, and get quantities in the units you actually buy.
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Each result becomes a section of materials. Your saved prices fill in automatically. Add labour, markup and VAT.
Send the quote
Download a branded PDF with your logo and terms, share a link, or send it on WhatsApp. Mark it accepted, then turn it into an invoice.
Estimating guides
All guides →Estimating concrete in South Africa: bags, cubes and MPa
Work out the volume, add sensible waste, then turn it into 50 kg bags of cement and cubes of sand and stone, or a ready-mix order in the strength on your plans.
4 min readConcrete & MasonryConcrete mixes by the wheelbarrow
How South African builders batch concrete, mortar, plaster and screed by the bag and the barrow, with the Concrete Society’s figures for each mix.
3 min readConcrete & MasonryBagged cement or ready-mix: where the break-even sits
How to compare mixing on site with ordering ready-mix for your job, using your own supplier prices, and what else besides price should decide it.
4 min readConcrete & MasonryStrip foundations under SANS 10400-H
The widths, thickness and concrete SANS 10400-H asks for under house walls, how to take off the trenches, concrete and foundation brickwork, and when you need an engineer.
3 min readConcrete & MasonryFloor slabs, DPM and mesh
What SANS 10400-J asks of a concrete floor slab on the ground: thickness, membrane, panel sizes and fill, and when the slab needs mesh or an engineer.
4 min readConcrete & MasonryDamp-proofing: DPC, DPM and rising damp
Where the damp-proof course and membrane go under SANS 10400-K and -J, the details that keep them working, and why plaster over the DPC is the most common cause of rising damp.
3 min read