EV Calc Pro
ESVE Electrical calculator
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
The fastest NEC-based electrical calculator built for EV charger installers. Wire sizing, transformer sizing, load calcs, voltage drop & more — all offline.
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.
The developer, Charge Rigs, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Charge Rigs, LLC
- Size
- 65.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Charge Rigs, LLC