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Cable Size Calculator
Find the correct cable size for any SA circuit. Checks current carrying capacity and voltage drop against SANS 10142. Single and three-phase.
Use Calculator →Trades & Artisan Tools — South Africa
Practical calculators for South African electricians, plumbers, painters, tilers and landscapers. SA standards, SA materials, real job conditions.
Electrician Tools
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Voltage Drop Calculator
Calculate voltage drop for any cable size, run length and load. Verify SANS 10142 compliance for new and existing circuits.
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DB Board Load Calculator
Calculate total load on a distribution board. Check phase balance, total amps, and whether your main breaker is correctly sized.
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Inverter / Battery Backup Sizing
Size an inverter and battery bank for your load shedding needs. Calculate runtime, battery capacity and inverter kVA required.
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Generator Size Calculator
Calculate the minimum generator size (kVA) to run your essential loads. Covers resistive and motor loads with starting current factors.
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Solar Panel Sizing Calculator
Size a solar PV system for your daily energy needs. SA irradiance data, panel quantity, and inverter sizing — linked to Section 12B tax incentive.
Use Calculator →Plumber Tools
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Geyser Size Calculator
Calculate the correct geyser capacity for your household. Based on number of occupants, usage patterns and SANS 10106 guidelines.
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Water Tank / JoJo Sizing Calculator
Size a JoJo or rainwater tank for your household needs. Daily consumption, roof catchment area and days of storage autonomy.
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Pipe Flow / Pressure Calculator
Calculate flow rate and pressure drop through pipes. Covers HDPE, uPVC and copper pipe for residential and light commercial applications.
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Rainwater Harvesting Calculator
Calculate how much water your roof can collect annually. SA rainfall data by province, roof area, and storage tank sizing recommendations.
Use Calculator →Painter Tools
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Paint Coverage Calculator (Material)
Need paint quantities and material cost instead of labour? Use the Paint Coverage Calculator in Developer Tools — Plascon and Dulux SA coverage rates, coats and wastage.
Material Calculator →✅ Live
Paint Labour Estimator
Estimate painting labour cost by surface area. SA labour rates per m² for walls, ceilings, trim and exterior surfaces.
Use Calculator →Bricklaying, Tiling & Plastering Tools
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Tiling Labour Cost Calculator
Estimate what a tiler will charge for your floor or wall project. 2026 SA tiler rates per m² for straight, diagonal and pattern layouts, with wet-area waterproofing.
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Plastering Labour Calculator
Estimate plasterer labour costs for any SA project. Scratch coat, finish coat or both. Low, mid and high range estimates based on 2026 SA rates per m².
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Bricklaying Labour Cost Calculator
Estimate what a bricklayer will charge to build your wall. 2026 SA rates per m² and per 1000 bricks for single skin, double skin and face brick walls.
Use Calculator →Garden & Landscaping Tools
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Irrigation / Lawn Watering Calculator
Calculate watering requirements for SA lawns and gardens. Water-wise scheduling based on grass type, climate zone and municipal restrictions.
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Soil / Compost Volume Calculator
Calculate topsoil, compost or mulch volumes for beds and lawns. Depth and area inputs, bulk bag quantities, and SA supplier sizing.
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Paving Labour Cost Calculator
Estimate what a paving contractor will charge for your driveway or patio. 2026 SA rates per m² for running bond, herringbone and base preparation.
Use Calculator →Also need property investor or developer calculators?
22 investor tools and building cost calculators are live now.