Wire Size Calculator

Calculate wire gauge for marine or RV circuits using ABYC standards.

Circuit Length (round trip)

Electrical Load

System Voltage

Maximum Voltage Drop

3% for electronics/instruments, 10% for lights/pumps

Temperature Rating

Conductors in Bundle

Engine room / high-temp install (−15%)

Recommended Wire Size

10 AWG

Based on voltage drop requirements

Based on ABYC E-11 standards.
For guidance only.

Want us to install this?

You've sized the wire. Book a consult and we'll install it to spec on your boat, RV, or van.