Voltage Drop Calc NEC & IEC

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The field electrician's voltage-drop calculator — NEC and IEC in one honest tool. Enter system voltage, load current and one-way run length, pick the conductor, and read the drop in volts, the percentage and a clear verdict against the 3% / 5% recommendation. Switch between NEC (AWG/kcmil, K-factor method, feet) and IEC 60364 (mm², resistivity method, meters) — copper and aluminum, single-phase and three-phase, adjustable power factor. PRO • Both standards in one app • Reverse sizing: enter a target % and get the smallest conductor that passes, with ampacity and breaker suggestion • Save calculations to history • Share clean PDF reports Built for gloves and sunlight: big keypad, huge results, Outdoor Bright mode. Everything stays on your phone — fully offline, no account, no tracking. Results are planning estimates; always verify with your local code authority. ——— Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://hdappstudio.com/voltagedrop/privacy/