EV Calc Pro

Charge Rigs, LLC

About this app

EV Calc Pro is the professional-grade electrical calculator built specifically for EV charger installers and electricians. Stop doing math on paper — get accurate, NEC-compliant results in seconds.

CALCULATORS INCLUDED:

⚡ EV Charger Load — Complete circuit analysis for EV charger installations
⚡ EV Site Load — Full service load calculation for multi-charger sites (NEC 220, 625)
⚡ Wire Size — NEC conductor sizing with temperature and conduit corrections
⚡ Voltage Drop — Voltage drop analysis with pass/fail results
⚡ Breaker Sizing — Overcurrent protection sizing per NEC
⚡ Transformer Sizing — kVA transformer sizing for EV service upgrades
⚡ Conduit Fill — NEC 358/344 conduit fill percentage calculator
⚡ Grounding Conductor — Equipment grounding conductor sizing
⚡ Ampacity Derating — Temperature and conduit fill derating per NEC 310
⚡ Box Fill — NEC 314.16 box fill calculation
⚡ Power Calculator — Watts, amps, and volts conversion

WHY EV CALC PRO:

• Built for the field — fast inputs, instant results
• 100% offline — no internet required, works on job sites
• NEC code references on every calculator
• Dark mode for working in low-light conditions
• Export and share results via text, email, or any app
• Free — no subscription, no paywalls

Part of the Charge Rigs family of tools for EV charging professionals.

What’s new

The fastest NEC-based electrical calculator built for EV charger installers. Wire sizing, load calcs, transformer sizing, voltage drop & more — all offline.