# Voltage Drop & Wire Size — NEC, Metric & Ampacity

> Electrical voltage drop and wire sizing calculator for NEC, Metric, and Ampacity. (iPhone/iPad app by Alona Nesterenko.)

- Source: https://appshunter.io/ios/app/voltage-drop-and-wire-size/id6762137454 (this page in markdown: same URL + `.md`)
- Developer: [Alona Nesterenko](https://appshunter.io/developer/1890650834)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.0 · 2 MB
- Languages: American English
- Released: 2026-04-16
- Data updated: 2026-09-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/voltage-drop-and-wire-size/id6762137454/reviews.md

## What is Voltage Drop & Wire Size?

Voltage Drop & Wire Size brings voltage-drop calculation and wire sizing into one practical workflow. Check a run with the conductor you already have in mind, see the result immediately, and move to a better size when the drop is outside your target.

• Check voltage drop with the conductor you want to evaluate
• Find the smallest available size that meets your selected target
• Send the recommended size back into the calculation

The app supports NEC / AWG and BS-style / Metric workflows across DC, single-phase AC, split-phase 120/240, and three-phase AC systems. You can enter load in amps or watts, choose copper or aluminum conductors, and work from preset drop limits or a custom target depending on the job you are checking.

• Review voltage drop in volts and percent
• See load voltage, running current, power loss, and a next-size-up comparison
• Adjust power factor and installation method

For NEC-based work, the app also supports ampacity-aware calculations with continuous load, ambient temperature, conductor grouping, and conductor temperature rating inputs. Saved calculations can be reopened later with notes, and ambient temperature can be shown in Celsius or Fahrenheit.

• Review adjusted ampacity in NEC mode
• Reopen saved calculations and keep notes with the job
• Switch ambient temperature display between Celsius and Fahrenheit

This app is intended as calculation guidance. Verify final conductor selection, ampacity, and installation requirements against the applicable standard and manufacturer data before use.

## Key features

- Voltage drop calculation
- Wire sizing
- NEC/AWG and Metric support
- Ampacity calculations
- Save and reopen calculations
- Adjustable temperature units

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Access | $1.99 | one-time |



## Frequently asked questions about Voltage Drop & Wire Size

### What electrical systems does Voltage Drop & Wire Size support?

Voltage Drop & Wire Size supports DC, single-phase AC, split-phase 120/240, and three-phase AC systems. It also accommodates both NEC/AWG and BS-style/Metric workflows.

### Can I save my calculations with Voltage Drop & Wire Size?

Yes, you can save your calculations with Voltage Drop & Wire Size. Saved calculations can be reopened later, and you can add notes to keep track of specific jobs.

### How does Voltage Drop & Wire Size handle different load inputs?

You can enter the load in either amps or watts when using Voltage Drop & Wire Size. The app also allows you to choose between copper or aluminum conductors.

### Does Voltage Drop & Wire Size offer international standards?

Yes, Voltage Drop & Wire Size supports both NEC/AWG standards for North America and BS-style/Metric workflows for international use.

### What temperature units can I use with Voltage Drop & Wire Size?

Voltage Drop & Wire Size allows you to switch the ambient temperature display between Celsius and Fahrenheit, catering to different regional preferences.

### How accurate are the calculations in Voltage Drop & Wire Size?

This app is intended as calculation guidance. It is recommended to verify final conductor selection, ampacity, and installation requirements against applicable standards and manufacturer data before use.

### Does Voltage Drop & Wire Size have ads?

No, Voltage Drop & Wire Size does not contain advertisements. It is a free application without any ad interruptions.

### What is the update frequency for Voltage Drop & Wire Size?

Voltage Drop & Wire Size was last updated on May 3, 2026, with version 1.1. While specific update frequency isn't detailed, this indicates active development.

## Version history (last 2 releases)

### 1.1 — 2026-05-03

UI Improvements

### 1.0 — 2026-04-17

No release notes.

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## More apps by Alona Nesterenko

- [Pips & Lot Size Calculator](https://appshunter.io/ios/app/pips-and-lot-size-calculator/id6751819770)
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- [Forex TP & Risk Calculator](https://appshunter.io/ios/app/forex-tp-and-risk-calculator/id6752648514)
- [TakeProfit Pro: Coin TP Calc](https://appshunter.io/ios/app/takeprofit-pro-coin-tp-calc/id6752890162)
- [Nail Health Scanner](https://appshunter.io/ios/app/nail-health-scanner/id6752996793)
- [Tooth Shade Scanner](https://appshunter.io/ios/app/tooth-shade-scanner/id6753220158)

All apps by Alona Nesterenko: https://appshunter.io/developer/1890650834

## Related topics

[voltage drop](https://appshunter.io/ios/topics/voltage-drop) · [dc wire sizer](https://appshunter.io/ios/topics/dc-wire-sizer)

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*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 2026-09-07.*