ProVolt: Electrical Calculator

ProVolt is a fast, offline electrical calculator built specifically for professional electricians, apprentices, and electrical engineers. Whether you are in a basement, on a new construction site, or in a dead zone, ProVolt is ready to work when you are.

No accounts, no sign-ups, and no internet required. Just clean, accurate field calculations that show you the math behind every result.

⚡ FIELD-READY CALCULATORS

Voltage Drop: Calculate single-phase and three-phase drops. Select copper or aluminum conductors and verify results against your specific percentage limit.

Ohm's & Watt's Law: A high-speed solver. Enter any two variables (Volts, Amps, Ohms, or Watts) and solve the rest instantly.

Ampacity Derating: Easily apply temperature corrections and adjustment factors to your base ampacity.

Conduit Fill %: Select your conduit, input conductor diameters, and instantly see the fill percentage against your set limit.

Conduit Offset Bends: Get accurate, clean offsets with simple distance-between-bends and shrink calculations.

WHY PROVOLT?

100% Offline: Field work shouldn't depend on a signal. ProVolt works everywhere.

Privacy First: We don't track you. No account, no login, and no data collection. Your inputs stay on your phone.

Built for the Job: High-contrast, clean interface designed to be readable in bright or low-light conditions.

Transparent Physics: We use original calculations based on electrical physics, not black-box estimation.

FREE VS. PRO
ProVolt offers core tools for free forever, including Voltage Drop and Ohm's Law. Unlock the full potential of your toolkit with a single one-time purchase—no annoying monthly subscriptions. ProVolt Pro includes Ampacity Derating, Conduit Fill, Conduit Bends, and every future calculator we add.

⚠️ IMPORTANT DISCLAIMER
ProVolt performs original calculations based on electrical physics and the values you enter. It does not reproduce the National Electrical Code (NFPA 70) and is not a substitute for the NEC, a licensed electrician's professional judgment, or the requirements of your local Authority Having Jurisdiction (AHJ).

Always verify results against the code adopted in your area before performing electrical work.

ProVolt is independent and is not affiliated with, authorized by, or endorsed by the National Fire Protection Association (NFPA). "NEC", "National Electrical Code", and "NFPA 70" are registered trademarks of the NFPA.

Feedback or requests? We are building this for the trade. Email us at [email protected] with the calculators you want to see next.