Voltage Drop Calc NEC & IEC
Wire size, Cu/Al, % drop
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Check percent drop in one tap — NEC and IEC in the same app, copper or aluminum, single or three phase, plus the minimum size that passes.
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.
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Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://hdappstudio.com/voltagedrop/privacy/
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The developer, HD YAPIMCILIK VE TEKNOLOJI ITHALAT IHRACAT TICARET LIMITED SIRKETI, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- HD YAPIMCILIK VE TEKNOLOJI ITHALAT IHRACAT TICARET LIMITED SIRKETI
- Size
- 10.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 10 more
- English, Arabic, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- VoltageDrop Pro — Lifetime $29.99
- VoltageDrop Pro — Monthly $2.99
- VoltageDrop Pro — Yearly $14.99
- Copyright
- © 2026 Ercan Onur Ensert