# Voltage Drop Calculator. — Wire Size, NEC & IEC Tools

> Electrical voltage drop and wire sizing calculator for NEC and IEC standards. (iPhone/iPad app by V PUGAZHENTHI.)

- Source: https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064 (this page in markdown: same URL + `.md`)
- Developer: [V PUGAZHENTHI](https://appshunter.io/developer/491898049)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Rating: 4.60/5 from 412 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 45 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Brazilian Portuguese, Chinese (Simplified, China), European Spanish
- Released: 2017-02-10
- Data updated: 2026-08-21
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064/reviews.md

## What is Voltage Drop Calculator.?

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

## Key features

- NEC and IEC dual standards
- Voltage drop and wire sizing calculations
- Support for continuous load and corrections
- Copper or Aluminum conductor options
- Single-phase and three-phase systems
- Automatic compliance checks
- PDF report generation

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Go Pro | $4.99 | one-time |


## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064/reviews.md

### 1/5 — Décevant

*2025-12-18*

Cette nouvelle version va très mal, elle fait perdre du temps en plus d’être bombardée d’annonces.

**Developer response:** Nous sommes désolés pour la gêne occasionnée et vous remercions pour votre retour. Nous travaillons actuellement sur la version 9.7, qui proposera plus de fonctionnalités et moins de publicités. Merci pour votre patience.

### 1/5 — 慎用，无直流

*2025-09-27*

没有直流

**Developer response:** 请联系我们@contact.pugal.apps@gmail.com，我们将尝试解决该应用程序的问题。

### 3/5 — Keyboard disappears

*2025-07-14*

Just downloaded and tried first calculation. When modifying some fields in cable parameters the pop up keyboard (on iPhone) appears and disappears again before anything can be entered. iPhone issue or app?

**Developer response:** Keypad issue fixed in version 9.4 — now smoother, with accurate IEE/NEC-based calculations.
kindly update.

### 1/5 — Seccionen de conductores

*2025-04-13, version 9.2*

Pese a que la he comprado, cada vez tiene más publicidad, está insoportable

### 5/5 — Recommended

*2024-08-05*

Does the job quick and precise

### 5/5 — Perfect for Solar wire sizing

*2023-12-11*

Was blind but now I see long ago mistakes thanks author of Solar independent utility systems manual

### 5/5 — Voltage Drop Calculator

*2023-05-30*

Quick and easy, with plenty of variables.

### 2/5 — Lack of features

*2023-01-23*

Does not support Copper vs Aluminium wire, or proper metric sizes, only equivalent wire gauge.

**Developer response:** The App supports wire sizes in mm, inch, AWG.
The types of wires supported are copper , Aluminium, carbon steel, electrical steel, nichrome etc

### 2/5 — Needs work

*2022-05-01*

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.

### 1/5 — Utiliza medidas no españolas

*2019-10-08, version 5.1*

El programa no usa medidas españolas pero además se ha colgado 2 veces nada más empezar

## Frequently asked questions about Voltage Drop Calculator.

### What does the Voltage Drop Calculator app do?

This app performs accurate voltage drop and wire sizing calculations for both NEC (National Electrical Code) and IEC standards. It helps users determine the appropriate wire size for their electrical projects and ensures compliance with electrical codes.

### What are the key features of this app?

Key features include support for dual NEC and IEC standards, calculations for voltage drop and required wire size, options for conductor material (copper/aluminum) and system type (single/three-phase), and support for load corrections like continuous load and ambient temperature. It also offers automatic compliance checks and PDF report generation.

### Is this app free to use?

The app is free to download and use, but it offers in-app purchases. This means certain advanced features or functionalities might require a purchase to unlock.

### What electrical standards does the app support?

The app supports both the NEC (National Electrical Code) standards, using AWG/Imperial units, and IEC standards, using mm²/Metric units. This dual support makes it versatile for users working in different regions or adhering to specific code requirements.

### Who would benefit from using this app?

This app is designed for electricians, engineers, and contractors who need to perform precise electrical calculations, such as voltage drop and wire sizing, while on the go. It provides reliable results and professional reporting features for job site use.

## Version history (last 5 releases)

### 10.1 — 2026-07-16

• New: more free tools for your electrical work
• Better privacy protection and bug fixes

### 10 — 2026-06-06

• Redesigned app with a clean tab layout — Calculators & Settings at a glance

### 9.8 — 2026-01-30

Regular update with performance improvements.

### 9.7 — 2026-01-08

• Added accurate Voltage Drop and Wire Size calculations with NEC and IEC support
• New option to remove ads for an uninterrupted experience

### 9.5 — 2025-09-12

Quick update: Wire sizes now available in inches and millimeters.

## Apps similar to Voltage Drop Calculator.

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Rule of Three Calculator](https://appshunter.io/ios/app/rule-of-three-calculator/id1185318300) | 2.3 (4) | Free | Utilities |
| [TLF Events Tamil](https://appshunter.io/ios/app/tlf-events-tamil/id1481109080) | — | Free | Utilities |
| [レコーダー - スピークバディ パーソナルコーチング](https://appshunter.io/ios/app/id1469874020) | — | Free | Utilities |
| [小灵龙App](https://appshunter.io/ios/app/app/id1221738240) | 1.0 (12) | Free | Utilities |
| [JEDA Live 職達](https://appshunter.io/ios/app/jeda-live/id1476523220) | — | Free | Utilities |
| [SSI Steel Design](https://appshunter.io/ios/app/ssi-steel-design/id1474838160) | 3.0 (1) | Free | Utilities |

## More apps by V PUGAZHENTHI

- [Ohms Law Calc.](https://appshunter.io/ios/app/ohms-law-calc/id491898006)
- [Electrical Calculator](https://appshunter.io/ios/app/electrical-calculator/id495478153)
- [Electrical Converter](https://appshunter.io/ios/app/electrical-converter/id497685179)
- [Electrical Engineering Pack](https://appshunter.io/ios/app/electrical-engineering-pack/id505423236)
- [Elec Series & Parallel Calc.](https://appshunter.io/ios/app/elec-series-and-parallel-calc/id511296315)
- [Universal Converter.](https://appshunter.io/ios/app/universal-converter/id519552652)

All apps by V PUGAZHENTHI: https://appshunter.io/developer/491898049

## Related topics

[voltage drop](https://appshunter.io/ios/topics/voltage-drop) · [voltage drop calculators](https://appshunter.io/ios/topics/voltage-drop-calculators) · [drop hurt calc](https://appshunter.io/ios/topics/drop-hurt-calc) · [prysmian group voltage drop](https://appshunter.io/ios/topics/prysmian-group-voltage-drop) · [southwire voltage drop calculator](https://appshunter.io/ios/topics/southwire-voltage-drop-calculator) · [voltage drop pro](https://appshunter.io/ios/topics/voltage-drop-pro) · [wire size calculator](https://appshunter.io/ios/topics/wire-size-calculator) · [chute](https://appshunter.io/ios/topics/chute) · [v pugazhenthi](https://appshunter.io/ios/topics/v-pugazhenthi) · [voltage power](https://appshunter.io/ios/topics/voltage-power) · [available fault current calculator](https://appshunter.io/ios/topics/available-fault-current-calculator) · [electriciancalc nec calculator](https://appshunter.io/ios/topics/electriciancalc-nec-calculator) · [basecalc electric calculator](https://appshunter.io/ios/topics/basecalc-electric-calculator)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*