1. Home
  2. Topics
  3. Apps For Wire Sizing And Ampacity

Best Apps For Wire Sizing And Ampacity

249+ iOS apps curated and reviewed

4.6 avg rating
17 free apps
Updated October 2026

Southwire® Voltage Drop Calc is the household name in apps for wire sizing and ampacity, but it's far from the only option. We track 249+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Apps For Wire Sizing And Ampacity (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Southwire® Voltage Drop CalcSouthwire® Voltage Drop CalcFree4.6★ (1.5K)NoNoOct 2026
2Lead Wire AmpacityLead Wire AmpacityFree—NoNoJun 2026
3Select Conductor Wire PROSelect Conductor Wire PROFree—NoNoMay 2026
4Electric Ref: Wire Size & FillElectric Ref: Wire Size & FillFree—NoYesAug 2026
5Wire Gauge & Size CalculatorWire Gauge & Size CalculatorFree4.9★ (13)YesYesOct 2026
6Mike Holt's Electrical ToolboxMike Holt's Electrical ToolboxFree4.6★ (197)NoNoOct 2026
7WireCalc - Wire SizingWireCalc - Wire Sizing$3.99 was $7.99—NoNoOct 2026
8Southwire® Conduit Fill CalcSouthwire® Conduit Fill CalcFree4.5★ (771)NoNoOct 2026

Top Picks for Apps For Wire Sizing And Ampacity

Southwire® Voltage Drop Calc#1

Southwire® Voltage Drop Calc by Southwire Company

Southwire Calculator
Editor's Choice
🔧 Utilities
4.6😐(1.5K ratings)
Free
Southwire® Voltage Drop Calc screenshot 1
Southwire® Voltage Drop Calc screenshot 2
Southwire® Voltage Drop Calc screenshot 3
Southwire® Voltage Drop Calc screenshot 4
Southwire® Voltage Drop Calc screenshot 5
Southwire® Voltage Drop Calc screenshot 6

Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.

What We Love

  • 🚀 Quick and useful
  • 🚀 Great Quick Reference
  • 👍 A must have app for electricians
  • 👍 Love These
  • 👍 Electrical Engineer
  • 👍 Awesome app
  • 👍 Safer
  • 👍 Useful
  • 👍 Handy
  • 👍 Great App
  • 👍 Dependable app
  • 👍 Electrician tech
  • 👍 Solid and simple to use app
  • 👍 Great app

Room to Improve

  • 🐛 Motor starting Voltage drop
  • 🐛 Useless!
  • 🐛 Won't work
  • 🐛 How to use
  • 🐛 Confused
  • 🐛 Bad app
  • 🐛 Bad
  • 🐛 Not applicable for Residential
  • 🐛 Electrician
  • 🐛 Terrible
  • 🐛 Not working
  • 🐛 What??
  • 🐛 Terrible
  • 🐛 Don't work
  • 🐛 Terrible
  • 🐛 Choice Between AWG and Metric wire Gauge
  • 🐛 Updated app not so simple
  • 🐛 The last version was better
  • 🐛 App
  • 🐛 Terrible
  • 🐛 Voltage drop calculator
  • 🐛 IOS 8
  • 🐛 One flaw
  • 🐛 Worst app ever
  • 🐛 Average
Select Conductor Wire PRO#3

Select Conductor Wire PRO by Caio Pinheiro

Electrical conductors
Worth Considering
🔧 Utilities
0.0(0 ratings)
Free
Select Conductor Wire PRO screenshot 1
Select Conductor Wire PRO screenshot 2

This app simplifies electrical conductor dimensioning for professionals and students. It offers precise calculations based on international standards, with an intuitive interface for quick and accurate results. Future updates will expand its capabilities.

More Apps For Wire Sizing And Ampacity apps to explore

FAQ about Apps For Wire Sizing And Ampacity

What are the best apps for wire sizing and ampacity for iPhone?
Southwire® Voltage Drop Calc tops our apps for wire sizing and ampacity ranking as of October 2026, with a 4.6-star average from 1.5K App Store ratings, and it's free to download.
Yes — 17 of the top apps for wire sizing and ampacity we rank are free to download, including Southwire® Voltage Drop Calc and Lead Wire Ampacity.
Southwire® Voltage Drop Calc has no ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 249+ apps for wire sizing and ampacity on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.