Best Wire Sizing Apps

199+ iOS apps curated and reviewed

4.6 avg rating
15 free apps
Updated June 2026

Finding the right wire sizing apps can be overwhelming with so many options. We've analyzed 199+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Wire Sizing Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Wire Gauge & Size CalculatorWire Gauge & Size CalculatorFree4.9★ (9)YesNoJul 2026
2Mike Holt's Electrical ToolboxMike Holt's Electrical ToolboxFree4.6★ (197)NoNoJul 2026
3Southwire® Voltage Drop CalcSouthwire® Voltage Drop CalcFree4.6★ (1.5K)NoNoJul 2026
4AWG Calculator: Wire SizeAWG Calculator: Wire SizeFree4.6★ (67)NoYesJul 2026
5WireCalc - Wire SizingWireCalc - Wire Sizing$1.99NoNoJun 2026
6DC Wire SizerDC Wire Sizer$2.995.0★ (21)NoNoJun 2026
7WireSizer - DC Voltage DropWireSizer - DC Voltage Drop$4.994.5★ (224)NoNoJul 2026
8Select Conductor Wire PROSelect Conductor Wire PROFree was $0.99NoNoMay 2026

Top Picks for Wire Sizing

Wire Gauge & Size Calculator#1

Wire Gauge & Size Calculator by V PUGAZHENTHI

Min Wire Gauge for Vdrop %
Editor's Choice
🔧 Utilities
4.9(9 ratings)
FreeAds
Wire Gauge & Size Calculator screenshot 1
Wire Gauge & Size Calculator screenshot 2
Wire Gauge & Size Calculator screenshot 3
Wire Gauge & Size Calculator screenshot 4
Wire Gauge & Size Calculator screenshot 5
Wire Gauge & Size Calculator screenshot 6

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.

Mike Holt's Electrical Toolbox#2

Mike Holt's Electrical Toolbox by Mike Holt Enterprises

Electrical Power Calculator
Strong Contender
🔧 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.

Southwire® Voltage Drop Calc#3

Southwire® Voltage Drop Calc by Southwire Company

Southwire Calculator
Worth Considering
🔧 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

More Wire Sizing apps to explore

4
AWG Calculator: Wire Size
AWG Calculator: Wire Size
AWG Calculator: Wire Size
Electrician Wire Tool
Free

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.

Wire size (AWG) calculationsVoltage drop calculationCircuit breaker sizing
🔧 Utilities
(67)
free with in-app purchases
5
WireCalc - Wire Sizing
WireCalc - Wire Sizing
WireCalc - Wire Sizing
Voltage Drop & Conduit Fill
$1.99
🔧 Utilities
(0)
6
DC Wire Sizer
DC Wire Sizer
DC Wire Sizer
Easy Wire Sizing Calculator!
$2.99

Calculate appropriate DC wire sizes for electrical projects, preventing equipment damage and fires. Save, edit, and export wire run details for electrical plans and material purchases. Features a wizard for easy sizing for all users.

Calculates wire size, voltage drop, and ampacitySupports custom DC voltages up to 500 ampsSave, edit, and export wire run details
🔧 Utilities
(21)
paid
7
WireSizer - DC Voltage Drop
WireSizer - DC Voltage Drop
WireSizer - DC Voltage Drop
DC Wire Size Calculator
$4.99

This app quickly calculates the correct DC wire gauge needed for any circuit. Simply input voltage, current, and length to determine the optimal wire size, considering voltage drop and ampacity limits. It's suitable for various DC systems up to 60 VDC.

Instant DC wire size calculationVoltage drop percentage selectionAmpacity limit checks
🔧 Utilities
(224)
paid
8
Select Conductor Wire PRO
Select Conductor Wire PRO
Select Conductor Wire PRO
Electrical conductors
Free
$0.99 | 100% OFF

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.

Electrical conductor dimensioningB1 and B2 installation methodsCompliance with IEC 60364 standards
🔧 Utilities
(0)
free
9
Wire Size Calc
Wire Size Calc
Wire Size Calc
NEC Ampacity & Derating
$0.99
🔧 Utilities
(0)
10
Voltage Drop Calculator.
Voltage Drop Calculator.
Voltage Drop Calculator.
Wire Size, NEC & IEC Tools
Free

Calculate voltage drop and wire size using both NEC and IEC standards. Supports various load types, conductor materials, and system configurations. Generates detailed reports for electricians, engineers, and contractors.

NEC and IEC dual standardsVoltage drop and wire sizing calculationsSupport for continuous load and corrections
🔧 Utilities
(412)
free with in-app purchases
11
Lead Wire Ampacity
Lead Wire Ampacity
Lead Wire Ampacity
Southwire Calculator
Free
🔧 Utilities
(0)
12
Wire Gauge Charts - Size tables for AWG, SWG, BWG
Wire Gauge Charts - Size tables for AWG, SWG, BWG
Wire Gauge Charts - Size tables for AWG, SWG, BWG
by Chewy Applications
$0.99

Access comprehensive wire gauge charts for AWG, SWG, and BWG. Quickly find diameter, area, resistance, and weight values for various wire types with easy scrolling or a search bar. Includes comparison tables and specific data for aluminum and copper wires.

Wire gauge charts (AWG, SWG, BWG)Diameter, area, resistance, weight valuesComparison tables
🔍 Reference
(4)
paid
13
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
14
Circuit Wizard
Circuit Wizard
Circuit Wizard
by Blue Sea Systems, Inc.
Free

This app assists electricians and enthusiasts in calculating wire sizes for installations based on ABYC and Blue Sea Systems specifications. It also helps find suitable protective products for circuits. The application functions completely offline.

Wire sizing calculationABYC and Blue Sea Systems specificationsProduct search for circuit protection
🔍 Reference
(19)
free
15
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
16
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
17
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
18
E-Wire Calc
E-Wire Calc
E-Wire Calc
by ELEKTRISOLA
Free

This tool helps determine technical characteristics of enamelled copper wire based on industry standards. It offers functions for diameter conversion, resistance calculations, and breakdown voltage.

Diameter conversion (mm, inch, AWG)Resistance calculationMetal wire diameter calculation
🔧 Utilities
(1)
free
19
Esteves Eddie Wire Solutions
Esteves Eddie Wire Solutions
Esteves Eddie Wire Solutions
Esteves Group
Free

This advanced tool transforms your device into a user-friendly wire drawing calculator. It offers precision for wire customization, automatic string calculations, production optimization, and unit conversions. Professionals can easily share results and customize settings for an enhanced workflow.

Wire customization and die size sequence creationAutomatic elongation string calculationsProduction length and weight estimation
🔧 Utilities
(7)
free
20
Voltage Drop & Wire Size
Voltage Drop & Wire Size
Voltage Drop & Wire Size
NEC, Metric & Ampacity
Free
🔧 Utilities
(0)

FAQ about Wire Sizing

What are the best wire sizing apps for iPhone?
Wire Gauge & Size Calculator tops our wire sizing apps ranking as of June 2026, with a 4.9-star average from 9 App Store ratings, and it's free to download.
Yes — 15 of the top wire sizing apps we rank are free to download, including Wire Gauge & Size Calculator and Mike Holt's Electrical Toolbox.
Wire Gauge & Size Calculator shows ads and has no in-app purchases, according to its App Store listing as of June 2026.
We track 199+ wire sizing apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.
The app calculates the minimum wire size required based on your input parameters like voltage, current, distance, and allowable voltage drop percentage. It supports units like AWG, mm, mm², and inches.
Yes, Wire Gauge Calculator allows you to choose from Copper, Aluminum, or Electrical Steel as the wire material for your calculations.

Related searches