Voltage Drop Calculator.

Name: Voltage Drop Calculator.
Rating: 4.6 (405 reviews)
Author: V PUGAZHENTHI

Wire Size, NEC & IEC Tools

Free · In‑App Purchases · Designed for iPad

405 Ratings
Ages

4+
Years
Category

Utilities
Developer

V PUGAZHENTHI
Language

EN
+ 7 More
Size

33.6
MB

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

Ratings & Reviews

4.6

out of 5

405 Ratings

Voltage Drop Calculator
05/30/2023

Toothengr
Quick and easy, with plenty of variables.
Voltage Drop Calculator
05/30/2023

Toothengr

Quick and easy, with plenty of variables.
Perfect for Solar wire sizing
12/11/2023

kyle william loshure
Was blind but now I see long ago mistakes thanks author of Solar independent utility systems manual
Perfect for Solar wire sizing
12/11/2023

kyle william loshure

Was blind but now I see long ago mistakes thanks author of Solar independent utility systems manual
Agyzhbhyhvvc
10/02/2018

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T cbijxv I’ll O’Connorvoib MSU I IECxde. IOU’s cv B.B.tgxrt
Agyzhbhyhvvc
10/02/2018

ntntxgntg

T cbijxv I’ll O’Connorvoib MSU I IECxde. IOU’s cv B.B.tgxrt
Needs work
05/01/2022

TB6059
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.
Needs work
05/01/2022

TB6059

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.

Regular update with performance improvements.

Version 9.8

19h ago

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