# WireCalc — Calc resistance & voltage drop > Electrical wire resistance and voltage drop calculator with wire gauge lookup. (iPhone/iPad app by Black Cat Systems.) - Source: https://appshunter.io/ios/app/wirecalc/id301047029 (this page in markdown: same URL + `.md`) - Developer: [Black Cat Systems](https://appshunter.io/developer/301047032) - Category: Reference, Lifestyle - Price: $2.99 - Rating: 4.50/5 from 6 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 9.0 · 3 MB - Languages: American English - Released: 2009-01-03 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/wirecalc/id301047029/reviews.md ## What is WireCalc? Need to compute the electrical resistance or voltage drop of a wire or cable? Now there’s no need to carry lookup tables with you, and calculate values by hand, because WireCalc does all this for you, and more. Enter in the length of the wire, using English or Metric units, the gauge, select the type of wire (either Copper or Aluminum) and WireCalc computes the resistance. Enter in the current, and the voltage drop is also computed. There is also a table of all wire gauges from 000000 to 50, with the diameter, area and resistance listed, for quick lookup. Buy your copy of WireCalc today, and start spending less time calculating and more time working. ## Key features - Calculate wire resistance - Compute voltage drop - Support for English and Metric units - Copper and Aluminum wire types - Wire gauge lookup table - Diameter and area data ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/wirecalc/id301047029/reviews.md ### 5/5 — Very useful *2022-01-03* I have used this app many times and it is very helpful ### 5/5 — Great app *2014-09-13* Clear and correct! I use it every day ### 4/5 — Pretty good *2013-12-28, version 1.2* This app is very good, The display field runs into the menu bar on the iPhone, making it a bit confusing when first changing the settings but it does work. Does exactly what it says. ### 5/5 — Not seen in any other App *2013-10-25* It has a field to allow input of circular mils per Amp to evaluate PCB trace widths based on square mil cross-sectional area. The guys at Black Cat Systems were very responsive to this feature request. They had it up within days. Great job! ### 1/5 — Little Information, Way Overpriced! Bad Job. *2013-09-04* The screen shots show the entire app you are paying $2.99 for, so you can't say you were cheated. That's all there is: a very simple calculator of voltage drop in a wire, given gauge, length, and amp load, and a printed table that shows the physical size of a wire gauge (seldom useful: if you are using big wire sizes, you already know how much area to allow for the wire). THAT'S THE WHOLE APP. This is WAY, WAY overpriced, for an app that is too simple for an electrician, and too much odd information for a DIYer. This is a Bad Job. The real ripoff is that I assumed that anything so expensive must have more value. Not true in this case. ### 5/5 — Wire calc *2012-06-26* Useless ! ### 1/5 — Over priced *2009-03-14* Missing base voltage, drop percentage, fail pass according NEMA specs. ### 3/5 — Electrcal contractor *2009-01-19* Good but needs to include larger wire sizes. ### 2/5 — austrailia *2009-01-12, version 0* would be good if you warned people about it being american or you could make an update that would make it internationally friendly great idea tho ## Frequently asked questions about WireCalc ### What is WireCalc used for? WireCalc is used to compute the electrical resistance and voltage drop of wires and cables. It eliminates the need for manual calculations or lookup tables by providing instant results based on user inputs. ### What units does WireCalc support? WireCalc supports both English and Metric units for wire length, allowing for flexibility in calculations regardless of your preferred measurement system. ### Can WireCalc calculate for different wire materials? Yes, WireCalc allows you to select the type of wire, specifically supporting calculations for both Copper and Aluminum materials. ### Does WireCalc include a wire gauge reference? Yes, WireCalc features a table of all wire gauges from 000000 to 50, listing their diameter, area, and resistance for quick lookups. ### How much does WireCalc cost? WireCalc is a paid application priced at $2.99. This one-time purchase grants you access to all its features. ### On what devices can I use WireCalc? WireCalc is available for iPhone, iPad, and iPod devices, offering a convenient tool for mobile electrical calculations. ### How often is WireCalc updated? The latest version of WireCalc, 2.0, was last updated on May 24, 2022. This indicates a history of maintenance and potential improvements. ### Does WireCalc have ads? No, WireCalc does not contain advertisements. As a paid application, it offers an ad-free experience for its users. ## Version history (last 5 releases) ### 2.0 — 2022-05-24 Updates for the latest iOS. ### 1.4 — 2017-07-02 This app has been updated by Apple to display the Apple Watch app icon. Updates for iOS 10 64 bit ### 1.3 — 2015-02-05 Updates for iOS 8.1.2. ### 1.2 — 2013-10-25 iOS 7 support ### 1.1 — 2013-01-05 Updates for iOS 6 and iPhone 5 ## More apps by Black Cat Systems - [Transmission Line Calc](https://appshunter.io/ios/app/transmission-line-calc/id302734281) - [RF Link Calc](https://appshunter.io/ios/app/rf-link-calc/id303034300) - [dB Calc](https://appshunter.io/ios/app/db-calc/id303470503) - [Drill Calc](https://appshunter.io/ios/app/drill-calc/id304434324) - [Photon Calc](https://appshunter.io/ios/app/photon-calc/id304436071) All apps by Black Cat Systems: https://appshunter.io/developer/301047032 --- *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 2026-06-10.*