ISO Wire Size Calculator
Cable Run (both ways)
Electrical Load
System Voltage
Max. Voltage Drop
Conductor/Insulation Temperature Rating
Current-Carrying Conductors in the Bundle
Installation in Engine Compartment?
Calculate Wire Size

ISO Wire Size Calculator

This tool helps you to determine the proper size for the conductors on your boat according to the ISO 13297 standard.
Make sure to check out our tutorial before using it.

Disclaimer: We are not reliable for any errors in this calculator. Results should always be cross-checked with the original ISO tables!