Electrical Calculators
Accurate, practical tools for electrical design, analysis and everyday engineering checks.
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Cable Size Calculator
Compare every listed conductor size against your voltage drop limit and select the smallest one that passes, with your own correction factors applied to the design current.
cable sizingconductor sizederating
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Voltage Drop Calculator
Check permissible voltage drop across feeders and final circuits.
voltage dropfeedercable run
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Electrical Load Calculator
Build connected and diversified load schedules for boards and feeders.
load calculationdemand factordiversity
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Earthing Calculator
Electrode resistance and conductor sizing checks for earthing systems.
earthingearth electrodesoil resistivity
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Fault Current Calculator
Estimate prospective short circuit current at distribution boards.
short circuitfault levelbreaking capacity
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OCPD Calculator
Calculate the required overcurrent protection current from your design current, with any continuous-load factor you supply. Standard device ratings are shown only when verified rating data is available.
ocpd calculatorovercurrent protection devicebreaker sizing
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Transformer Calculator
Full load current, impedance and kVA rating checks for distribution transformers.
transformerkVAfull load current
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