Below are handy calculators. The AWG Sizing Calculator helps you select correct cabling. The Off-Grid Load & System Sizer calculator sums up your total Wh/day, estimating common loads, and you can refine duty and average hours of use. The Voltage Drop Calculator compares different Cable/wire sizes (AWG) to their voltage drops over a specfic Distance. Use these tools at your own risk.

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AWG Sizing Calculator

Recommend AWG Voltage Drop for AWG

System Voltage

12 V DC 24 V DC 48 V DC 120 V AC Custom

Values marked “AC” assume 60 Hz single-phase. “DC” for battery/solar systems. One-way Length (ft) Calculator uses round-trip length internally. Current (A) Conductor Copper Aluminum

Target Voltage Drop (%) Common design target is 3% or less. Max Temperature Rise consideration Typical Hot Environment Hot environments can justify upsizing one gauge.

Calculate Recommended AWG

AWG Reference (Resistance per 1000 ft)

AWG

Copper Ω/kft

Aluminum Ω/kft

Approx. Ampacity*

*Ampacity is a rough guide. Always check NEC or local code for AC branch circuits and manufacturer guidance for DC.

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