Voltage Drop Calculator

Single-phase, three-phase or DC. Use your licensed table figures (mV/A·m) or the impedance method — every step of the maths is shown, and nothing is called compliant on voltage drop alone.

Beta — check everything. These calculators are new and may not always be correct. Cross-reference every result against the current standards (AS/NZS 3000, AS/NZS 3008), manufacturer data and your own working before relying on it.