ProVolt: Electrical Calculator

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About this app

ProVolt is a fast, offline electrical calculator for electricians, apprentices, and electrical engineers. No account, no sign-up, no internet — just clean field calculations that show the numbers behind every result.

CALCULATORS
• Voltage Drop — single-phase and three-phase, copper or aluminum, with the percent drop checked against a limit you set.
• Ohm's & Watt's Law — enter any two of volts, amps, ohms, or watts and solve the rest.
• Ampacity Derating — apply temperature correction and your adjustment factor to a base ampacity you provide.
• Conduit Fill % — pick your conduit, enter your conductors' diameters, and see the fill percentage against the limit you set.
• Conduit Offset Bends — distance-between-bends and shrink for clean, accurate offsets.

WHY PROVOLT
• Works fully offline — perfect for basements, new construction, and dead zones.
• No account and no data collection. Your inputs never leave your phone.
• Clean, high-contrast interface designed for the field.
• Original calculations from established electrical physics.

FREE & PRO
Voltage Drop and Ohm's Law are free forever. ProVolt Pro is a single one-time purchase that unlocks Ampacity Derating, Conduit Fill, and Conduit Bends, plus every future calculator.

IMPORTANT
ProVolt performs original calculations from physics and from values you enter. It does not reproduce the National Electrical Code (NFPA 70) and is not a substitute for it, for a licensed electrician's judgment, or for your local authority having jurisdiction. Always verify results against the code adopted in your area before performing electrical work.

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

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