--- title: "Voltage Drop Calculator. - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Perform accurate Voltage Drop and Wire Sizing calculations for both NEC® (National Electrical Code) and IEC standards. Built for electricians, engineers, and contractors who need reliable results on t" --- # Voltage Drop Calculator. — United States > Wire Size, NEC & IEC Tools ![Voltage Drop Calculator. App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/fc/32/01/fc320140-f1f8-341f-17f3-f4024e39fd65/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [V PUGAZHENTHI](https://apptail.io/developer/v-pugazhenthi-ufi) **Category:** Utilities **Rating:** 4.6/5 (408 ratings) **Price:** Free **Bundle ID:** com.pugazh.voltageDropCalculator **Store:** Apple App Store **Country:** United States **Version:** 9.8 (released 2026-01-30) **Original Release:** 2017-02-10 **Languages:** Spanish, German, Chinese, French, English, Italian, Dutch, Portuguese **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1203737064) **AppTail Page:** [https://apptail.io/app/voltage-drop-calculator-Jjvc/united-states](https://apptail.io/app/voltage-drop-calculator-Jjvc/united-states) ## Voltage Drop Calculator. Description Perform accurate Voltage Drop and Wire Sizing calculations for both NEC® (National Electrical Code) and IEC standards. Built for electricians, engineers, and contractors who need reliable results on the go. Voltage Drop Calculator • Dual standards: Switch between NEC (AWG/Imperial) and IEC (mm²/Metric) • Enter voltage, current, run length, and power factor • Supports continuous load (125%), grouping, and ambient temperature corrections • Copper or Aluminum conductors for single-phase and three-phase systems • Detailed results including ampacity, derating, voltage drop, and load voltage • Automatic compliance checks (e.g., ≤ 3% for branch circuits) Wire Size Calculator (Reverse) • Calculates required wire size for a target voltage drop % • Suggests optimal AWG, kcmil, or mm² • Uses NEC Chapter 9, Table 9 (AC impedance) with DC fallback Professional Tools • Wire converter (AWG/kcmil ↔ mm²) • Generate and share PDF reports • Handy electrical formula cards • Localized in English, Spanish, French, German, Italian, Dutch, Portuguese, and Chinese ## Voltage Drop Calculator. Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/d3/87/da/d387da08-e578-da37-3046-5cef83a44e91/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M5_U0029_-_2026-01-06_at_18.44.20.png/2064x2752.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/54/96/c3/5496c3c3-89f5-6c2f-2dce-aec75a75b51f/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M5_U0029_-_2026-01-06_at_18.44.45.png/2064x2752.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/40/b7/6b/40b76b4c-b2b5-3012-02b4-451cea07ab25/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M5_U0029_-_2026-01-06_at_18.45.15.png/2064x2752.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/eb/50/b9/eb50b979-be33-7789-93fc-b1e401756f19/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M5_U0029_-_2026-01-06_at_18.45.26.png/2064x2752.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/03/86/1d/03861d11-38f3-f105-008a-02f0fd0a3465/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M5_U0029_-_2026-01-06_at_18.46.16.png/2064x2752.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/87/7a/2a/877a2a2c-9cd3-9134-8467-a8bea9b6080c/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M5_U0029_-_2026-01-06_at_18.46.37.png/2064x2752.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/29/24/b7/2924b76f-7db0-de91-34fd-083dff447d65/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M5_U0029_-_2026-01-06_at_18.46.42.png/2064x2752.png) ## Voltage Drop Calculator. Rating Breakdown in United States - 5 stars: 331 (81%) - 4 stars: 38 (9%) - 3 stars: 16 (4%) - 2 stars: 6 (1%) - 1 stars: 17 (4%) ## Voltage Drop Calculator. Reviews in United States ### ***** "Perfect for Solar wire sizing" Was blind but now I see long ago mistakes thanks author of Solar independent utility systems manual -- kyle william loshure, 2023-12-11 ### ***** "Voltage Drop Calculator" Quick and easy, with plenty of variables. -- Toothengr, 2023-05-30 ### **--- "Needs work" I put in information for a sample 20 amp circuit. The answer I got was 14 AWG wire with a 20 amp breaker and a 12 AWG equipment ground. The NEC requires a 15 amp breaker for 14 AWG wire. -- TB6059, 2022-05-01 ### ***** "Agyzhbhyhvvc" T cbijxv I’ll O’Connorvoib MSU I IECxde. IOU’s cv B.B.tgxrt -- ntntxgntg, 2018-10-02 [View all Voltage Drop Calculator. reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Voltage Drop Calculator. 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