Norwegian English Svenska Polish Portuguese
Trainor is represented worldwide:

Voltage drop calculatorVoltage drop calculator

In this calculator you can easily calculate the expected total voltage drop in cables, and get an indication of the expected percentage of voltage drop in an installation.

In the calculation the standard value for resistivity is set to 0.0175 ohm*mm2/m for copper (cu), alternatively 0,029 ohm*mm2/m for aluminium (al).

Voltage UN
Number of phases
Wire material
Wire size (mm2)
Cable length (m) *
Current (A) *
Cos phi *

The calculator is only intended as an easy tool for assessment of the voltage drop, and does not in any way replace the need for calculation and documentation of an electrical installation by accepted methods. Trainor accepts no liability for the use of results from this calculator.