# Wire (AWG) Calculator — A&P Mechanic Toolbox

> Aircraft wiring AWG calculator based on FAA AC 43-13 1B. (iPhone/iPad app by Neil Rohan.)

- Source: https://appshunter.io/ios/app/wire-awg-calculator/id1526471471 (this page in markdown: same URL + `.md`)
- Developer: [Neil Rohan](https://appshunter.io/developer/1522614743)
- Category: Reference, Utilities
- Price: Free
- Rating: 4.20/5 from 6 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 24 MB
- Languages: American English
- Released: 2020-08-26
- Data updated: 2026-07-31
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/wire-awg-calculator/id1526471471/reviews.md

## What is Wire (AWG) Calculator?

AWG Calculator



IMPORTANT NOTICE: THIS CALCULATOR IS *NOT* A GENERAL PURPOSE WIRE GUAGE CALCULATOR. 

IT IS INTENDED SOLELY FOR FAA REGISTERED AIRCRAFT WIRING, LIMITED TO THE FOLLOWING APPROVED VOLTAGES: 14VDC, 28VDC, 115VAC AND 200VAC.



This app assists the aircraft airframe and powerplant (A&P) mechanic in determining the correct American Wire Gauge (AWG) wire size for given conditions, according to procedures outlined in FAA Publication AC 43-13 1B (Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair), Chapter 11. Conditions include circuit length, current, voltage, wire temperature (known or estimated) and derating factors for both altitude and wire bundle size/loading percentage.



The app also contains utilities that enable the aircraft mechanic to determine the following parameters without hands-on use of the AC 43-13 (when field/shop conditions make it impractical). Figures are referenced:



- Maximum Wire Length (standard temperature). 
-- Input parameters: circuit voltage, current, current flow and AWG. 
-- Output: L1.
-- Ref: AC 43-13 1B, Fig 11-2/3 



- Maximum Current (standard temperature). 
-- Input parameters: circuit voltage, current flow, wire length and AWG. 
-- Output: Max Current.
-- Ref: AC 43-13 1B, Fig 11-2/3 



- Altitude Deration Factor. 
-- Input parameter: Max Altitude. 
-- Output: Altitude Deration Factor.
-- Ref: AC 43-13 1B, Fig 11-5



- Bundle Deration Factor. 
-- Input parameters: Wire Count and Loading Percentage 
-- Output: Bundle Deration Factor.
-- Ref: AC 43-13 1B, Fig 11-5



- IMAX (elevated temperature). 
-- Input parameters: ambient temperature, conductor temperature rating and AWG. 
-- Output: IMAX.
-- Ref: AC 43-13 1B, Fig 11-4a/b



- Bundle Builder (NEW!)
  -- Input parameters: number of wires, awg sizes, wire currents, maximum altitude, ambient temperature, wire rating, loading factor
  -- Output: Bundle IMAX (derated for bundle and altitude) with table for IMAX per wire.
  -- Ref: AC 43-13 1B, Fig 11-4a/b



When a input/output parameters exceed chart limits, data is extrapolated and an appropriate warning ("** extrapolated data") is shown.



Disclaimer

The user of AWG CALCULATOR for any specific application without an independent verification of its accuracy does so at his/her own risk and assumes any and all liability resulting from such use. No warranty is offered as to the accuracy of results. Users should have a thorough understanding of the relevant theoretical criteria.

## Key features

- AWG wire size calculation
- Voltage, current, and length inputs
- Temperature and derating factors
- Altitude deration calculation
- Bundle deration calculation
- Bundle Builder utility

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/wire-awg-calculator/id1526471471/reviews.md

### 5/5 — Works Great

*2021-04-15, version v2*

An easy way to check yourself to make sure you’ve got the right wire gauge selected.

### 5/5 — Aircraft Mechanic Professional

*2020-11-09, version 1.0*

A definite need if your working on aircraft or learning to work on aircraft! Have also used on my at home DIY projects.

## Frequently asked questions about Wire (AWG) Calculator

### What is the primary purpose of Wire (AWG) Calculator?

Wire (AWG) Calculator is specifically designed for FAA-registered aircraft wiring, helping A&P mechanics determine the correct American Wire Gauge (AWG) based on various circuit conditions and FAA guidelines.

### Does Wire (AWG) Calculator support general wire gauge calculations?

No, this calculator is not a general-purpose wire gauge calculator. It is strictly limited to approved voltages for FAA-registered aircraft wiring: 14VDC, 28VDC, 115VAC, and 200VAC.

### What FAA publication does Wire (AWG) Calculator reference?

The app references FAA Publication AC 43-13 1B (Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair), specifically Chapter 11, for its calculations and procedures.

### What parameters can be calculated using Wire (AWG) Calculator?

The app can calculate maximum wire length, maximum current, altitude deration factor, bundle deration factor, IMAX (elevated temperature), and bundle IMAX (derated for bundle and altitude).

### Does Wire (AWG) Calculator have ads?

No, Wire (AWG) Calculator does not contain advertisements.

### What devices is Wire (AWG) Calculator available on?

Wire (AWG) Calculator is available for iPhone, iPad, and iPod devices.

### How often is Wire (AWG) Calculator updated?

The app was last updated on September 29, 2025, indicating regular updates to maintain its functionality and relevance.

### What is the user rating for Wire (AWG) Calculator?

Wire (AWG) Calculator has a rating of 4.2 stars from 6 ratings, suggesting positive user reception.

## Version history (last 5 releases)

### 6.1.0 — 2026-07-30

Fixed Share function to display on iPads

### 6.0.2 — 2026-07-14

More expedient data entry in Bundle utility; cleared logic error in Utilities page

### 6.0.1 — 2026-07-13

bug fix

### 6.0.0 — 2026-07-09

* Major renovation to all layouts to better fit latest iPads and iPhones
* Internal keyboard inputs simplify data entry
* Clarified parameter meanings/definitions
* Rigorous error checking to validate inputs
* Added Share and Support menu items
* Fixed max altitude bug and set limit to 60,000 feet
* Reformatted Output page for clarity / printer friendly
* Allow decimal input values (formerly integer only)
* Simplified internet check availabity (rate/share/support)

### 5.2 — 2025-09-29

Printing bug fixed; now able to print (if wifi printer is available) or use other various means (airdrop, email, notebook, copy/paste) to transfer output to permanent storage

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All apps by Neil Rohan: https://appshunter.io/developer/1522614743

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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 2026-07-31.*