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Free electrical calculators for Australia, built to AS/NZS 3000 + 3008. Cable sizing, voltage drop, max demand, RCD checker, solar tools — right in your browser.
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AS/NZS Calculators
Standards-based electrical calculators
Cable Sizing
Calculate cable size based on load, length, and installation method per AS/NZS 3008
Voltage Drop
Check voltage drop percentage for cable runs per AS/NZS 3008
Max Demand
Calculate maximum demand using AS/NZS 3000 diversity factors
Conduit Fill
Determine minimum conduit size for cable groups per AS/NZS 3000
Cable Derating
Calculate derating factors for grouped cables per AS/NZS 3008
RCD Requirements
Check RCD requirements by circuit type and location per AS/NZS 3000
Earth Fault Loop
Design check, dead test, and live test — verify fault loop impedance per AS/NZS 3000
Solar Installer Tools
AS/NZS 5033 & CEC tools for solar
Instrumentation
Tools for instrument technicians
4-20mA Scaler
Convert between 4-20mA signals and process values
RTD Lead Error
Calculate temperature error from RTD lead wire resistance
Thermocouple
Convert mV to temperature with cold junction compensation
Calibration
Calculate error, deadband, hysteresis from test readings
PID Tuning
Calculate controller parameters from step test data
SIL Verification
Verify safety integrity levels per IEC 61511 / AS 61511