Best Wire Ampacity Apps

194+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated June 2026

Finding the right wire ampacity apps can be overwhelming with so many options. We've analyzed 194+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Wire Ampacity Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1AWG Calculator: Wire SizeAWG Calculator: Wire SizeFree4.6★ (67)NoYesJul 2026
2Southwire® Voltage Drop CalcSouthwire® Voltage Drop CalcFree4.6★ (1.5K)NoNoJul 2026
3Mike Holt's Electrical ToolboxMike Holt's Electrical ToolboxFree4.6★ (197)NoNoJul 2026
4Wire Gauge & Size CalculatorWire Gauge & Size CalculatorFree4.9★ (9)YesNoJul 2026
5Southwire® Conduit Fill CalcSouthwire® Conduit Fill CalcFree4.5★ (746)NoNoJul 2026
6Electrical AmpsElectrical AmpsFree3.0★ (2)YesYesJul 2026
7Building Wire SelectorBuilding Wire SelectorFree5.0★ (2)NoNoMay 2026
8Wire (AWG) CalculatorWire (AWG) CalculatorFree4.2★ (6)NoNoJul 2026

Top Picks for Wire Ampacity

AWG Calculator: Wire Size#1

AWG Calculator: Wire Size by Melchisedec Martinez Rodriguez

Electrician Wire Tool
Editor's Choice
🔧 Utilities
4.6(67 ratings)
FreeIn-App Purchases
AWG Calculator: Wire Size screenshot 1
AWG Calculator: Wire Size screenshot 2
AWG Calculator: Wire Size screenshot 3
AWG Calculator: Wire Size screenshot 4
AWG Calculator: Wire Size screenshot 5

This professional tool provides electricians with accurate, code-based electrical calculations for wire sizing, voltage drop, circuit breakers, and more. It includes NEC® code references and specialized calculations for various systems. Save time and ensure accuracy in the field or during planning.

Southwire® Voltage Drop Calc#2

Southwire® Voltage Drop Calc by Southwire Company

Southwire Calculator
Strong Contender
🔧 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

Room to Improve

  • 🐛 Motor starting Voltage drop
  • 🐛 Useless!
  • 🐛 Won't work
Mike Holt's Electrical Toolbox#3

Mike Holt's Electrical Toolbox by Mike Holt Enterprises

Electrical Power Calculator
Worth Considering
🔧 Utilities
4.6(197 ratings)
Free
Mike Holt's Electrical Toolbox screenshot 1
Mike Holt's Electrical Toolbox screenshot 2
Mike Holt's Electrical Toolbox screenshot 3
Mike Holt's Electrical Toolbox screenshot 4

This app provides essential calculations for electricians, inspectors, contractors, and engineers. It helps determine conductor sizing, circuit protection, race sizing, and grounding conductor sizes for various electrical equipment and services.

More Wire Ampacity apps to explore

4
Wire Gauge & Size Calculator
Wire Gauge & Size Calculator
Wire Gauge & Size Calculator
Min Wire Gauge for Vdrop %
Free

This utility app calculates the minimum wire size needed for electrical installations based on voltage, current, distance, and allowable voltage drop. It supports various units and wire materials, ensuring safe and efficient power distribution for diverse applications.

Calculates minimum wire gaugeSupports voltage drop percentageMultiple wire size units (AWG, mm, mm², inches)
🔧 Utilities
(9)
ad-supported
5
Southwire® Conduit Fill Calc
Southwire® Conduit Fill Calc
Southwire® Conduit Fill Calc
by Southwire Company
Free

This tool assists electricians, engineers, and contractors in determining the correct conduit size based on NEC guidelines. It calculates conduit fill percentages and jam probability, saving time compared to manual calculations.

Conduit size calculationNEC fill percentagesJam probability
🔧 Utilities
(746)
free
6
Electrical Amps
Electrical Amps
Electrical Amps
The electrician's helper
Free

This app assists electrical tradespeople with ampacity calculations, incorporating correction factors based on the latest National and Canadian Electrical Codes. It offers a free trial period before requiring a monthly or yearly subscription for full functionality.

Ampacity calculationsCorrection factors2026 USA National Electrical Code compliance
💼 Business
(2)
free with in-app purchases
7
Building Wire Selector
Building Wire Selector
Building Wire Selector
Southwire Calculator
Free

This tool helps determine the correct conductor size and wire type for electrical installations. It adheres to the National Electrical Code® wiring methods, ensuring compliance and safety.

Conductor size determinationWire and cable type selectionNational Electrical Code compliance
🔧 Utilities
(2)
free
8
Wire (AWG) Calculator
Wire (AWG) Calculator
Wire (AWG) Calculator
A&P Mechanic Toolbox
Free

This app assists aircraft mechanics in selecting the correct American Wire Gauge (AWG) for aircraft wiring. It calculates wire size based on circuit length, current, voltage, temperature, and derating factors, referencing FAA guidelines.

AWG wire size calculationVoltage, current, and length inputsTemperature and derating factors
🔍 Reference
(6)
free
9
Electrical Calculations
Electrical Calculations
Electrical Calculations
Cable sizing & capacity
Free

This app provides a comprehensive suite of electrical calculations for professionals. It supports various international standards and offers detailed reports in PDF format. The tool covers wiring, power, motor, and electronic calculations, along with extensive conversion tables and resources.

Wire size and voltage drop calculationsPower, current, and resistance calculationsMotor performance and connection diagrams
📊 Productivity
(125)
free with in-app purchases
10
Cerrowire Calculators
Cerrowire Calculators
Cerrowire Calculators
by Cerro Wire LLC
Free

Calculate conduit fill and size based on NEC guidelines for copper and aluminum building wire. Determine the maximum number of conductors for a given raceway or the required raceway size for specific conductors.

NEC conduit fill calculationsConduit sizing for conductorsSupports copper and aluminum wire
🔧 Utilities
(5)
free
11
Electrician Handy Tool
Electrician Handy Tool
Electrician Handy Tool
All in one electricians tools
Free

This app provides electricians with essential tools for conduit bending, calculations, and quick reference. It simplifies electrical work with features like voltage drop calculation and a user-friendly fraction calculator.

Voltage drop calculatorConduit bending calculatorFraction calculator
📊 Productivity
(21)
free with in-app purchases
12
Wire Color Code
Wire Color Code
Wire Color Code
Electrical circuit colors
Free

This app helps electricians and DIYers identify electrical wire colors globally. It offers country-specific codes, a large circuit database, and quick search functionality. Customize colors for your projects and enjoy a user-friendly interface for efficient electrical panel wiring.

Global country-specific wire color codesExtensive circuit database (up to 1000 circuits)Quick search for phase colors
📊 Productivity
(654)
free with in-app purchases
13
Lead Wire Ampacity
Lead Wire Ampacity
Lead Wire Ampacity
Southwire Calculator
Free
🔧 Utilities
(0)
14
WireGuard
WireGuard
WireGuard
Fast, modern, secure VPN
Free

This application facilitates the management and utilization of secure VPN tunnels. It supports importing configurations from various sources, including archives, files, and QR codes, or allows for manual creation. The app is under active development with user feedback driving new feature implementation.

Manage VPN tunnelsImport tunnels from archivesImport tunnels from files
🔧 Utilities
(840)
free
15
WireVPN - Fast VPN & Proxy
WireVPN - Fast VPN & Proxy
WireVPN - Fast VPN & Proxy
hotspot & vpn for iphone
Free

This app provides a secure and fast VPN service, prioritizing user privacy and security. It offers a vast network of servers worldwide with high bandwidth and low latency, ensuring a smooth and ad-free experience.

Fast and secure VPNGlobal server networkHigh bandwidth, low latency
📊 Productivity
(106K)
free
16
Wire Size Calc
Wire Size Calc
Wire Size Calc
NEC Ampacity & Derating
$0.99
🔧 Utilities
(0)
17
ElectricalWiringPro
ElectricalWiringPro
ElectricalWiringPro
by Intineo LLC
Free

This app provides electrical code and design calculations for professionals working with wiring systems. It includes tools for ampacity, wire sizing, box fill, and conduit fill, based on the 2011 National Electrical Code.

Ampacity and wire sizing calculationsDwelling service size calculationsBox fill calculations
📊 Productivity
(8)
free
18
AWG Convert
AWG Convert
AWG Convert
by Nelcea
Free

Easily convert wire sizes between American Wire Gauge (AWG) and metric/imperial units. Get diameter and cross-sectional area for your wiring needs.

AWG to metric conversionAWG to imperial conversionDiameter calculation
🔧 Utilities
(0)
free
19
NEC On The Run
NEC On The Run
NEC On The Run
by Northeast Conference
Free

Access live and on-demand sports content from the Northeast Conference. Watch games, highlights, and features from your favorite NEC schools and teams on your iPhone and iPad.

Live event streamingOn-demand video contentHighlight packages
⚽ Sports
(1.2K)
free
20
NG Wire: NEC Ampacity & Fill
NG Wire: NEC Ampacity & Fill
NG Wire: NEC Ampacity & Fill
Grounding Size, Motor, & Cover
Free

This app provides electrical construction professionals with quick access to National Electric Code® (NEC®) tables and calculations for wire, conduit, and motor data. It streamlines complex calculations for efficient and accurate results in the field or office.

NEC® table lookupGeneral conduit fill calculationsDetailed conduit fill calculations
📊 Productivity
(9)
subscription

FAQ about Wire Ampacity

What are the best wire ampacity apps for iPhone?
AWG Calculator: Wire Size tops our wire ampacity apps ranking as of June 2026, with a 4.6-star average from 67 App Store ratings, and it's free to download.
Yes — 19 of the top wire ampacity apps we rank are free to download, including AWG Calculator: Wire Size and Southwire® Voltage Drop Calc.
AWG Calculator: Wire Size has no ads and offers in-app purchases, according to its App Store listing as of June 2026.
We track 194+ wire ampacity apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.
AWG Calculator App performs a wide range of calculations including wire size (AWG), voltage drop, adjusted ampacity, circuit breaker sizing, equipment grounding conductor sizing, conduit and box fill, branch/feeder/service calculations, residential load calculations, Ohm’s Law, motor calculations, fire pump calculations, arc welder calculations, and HVAC electrical calculations.
Yes, AWG Calculator App includes searchable PDF articles for NEC® 2023 and NEC® 2026, professionally designed NEC® tables, and searchable NEC® FAQs for practical interpretation. It also supports service protection calculations over 100A.