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Electrical Calculators

18 calculators for Australian engineers, electricians and students.

Fundamentals

2 calculators

Ohm's Law

Solve V, I, R or P.

Electrical Power & Current

Convert between kW, kVA and current.

Cables & Installation

3 calculators

Voltage Drop

Cable voltage drop, forward or reverse.

Cable Sizing

Current rating and voltage drop.

Conduit Fill

Conduit fill percentage.

Motors

3 calculators

Motor Full-Load & Starting Current

Full-load and starting current.

Motor Speed & Torque

Synchronous speed, slip and torque.

Motor Starting Voltage Dip

Starting voltage dip on the bus.

Transformers & Fault Levels

3 calculators

Transformer Current & Fault

Current and secondary fault level.

Per-Unit Fault Level

Fault level via the per-unit method.

Distribution Fault Study Builder

Multi-bus radial fault levels.

Protection & Fault Levels

2 calculators

Earth Fault Loop Impedance

Loop impedance and earth fault current.

Protection Trip Time & TCC

Trip time and time-current curve.

Power

1 calculators

Power Factor Correction

Capacitor size to correct PF.

Supply & Generation

2 calculators

Maximum Demand

Estimated demand current.

Generator Sizing

Generator kVA for the load.

Renewable & Electrification

2 calculators

Solar PV String Voltage

PV string voltage limits.

EV Charger Sizing

Charger current and cable sizing.

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Results for guidance only — not a substitute for engineering judgement

Does not reproduce copyrighted Standards Australia material. Always consult current standards for compliance.