Best Wire Size Calculator Apps

222+ iOS apps curated and reviewed

4.6 avg rating
17 free apps
Updated June 2026

The best wire size calculator apps on iPhone average 4.6★ across 222+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.

Compare top Wire Size Calculator Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Southwire® Voltage Drop CalcSouthwire® Voltage Drop CalcFree4.6★ (1.5K)NoNoJul 2026
2Wire Gauge & Size CalculatorWire Gauge & Size CalculatorFree4.9★ (9)YesNoJul 2026
3AWG Calculator: Wire SizeAWG Calculator: Wire SizeFree4.6★ (67)NoYesJul 2026
4Southwire® Conduit Fill CalcSouthwire® Conduit Fill CalcFree4.5★ (746)NoNoJul 2026
5Mike Holt's Electrical ToolboxMike Holt's Electrical ToolboxFree4.6★ (197)NoNoJun 2026
6Electrical CalculationsElectrical CalculationsFree4.6★ (125)YesYesJul 2026
7Building Wire SelectorBuilding Wire SelectorFree5.0★ (2)NoNoMay 2026
8WireSizer - DC Voltage DropWireSizer - DC Voltage Drop$4.994.5★ (224)NoNoJul 2026

Top Picks for Wire Size Calculator

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

Room to Improve

  • 🐛 Motor starting Voltage drop
  • 🐛 Useless!
  • 🐛 Won't work
Wire Gauge & Size Calculator#2

Wire Gauge & Size Calculator by V PUGAZHENTHI

Min Wire Gauge for Vdrop %
Strong Contender
🔧 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.

AWG Calculator: Wire Size#3

AWG Calculator: Wire Size by Melchisedec Martinez Rodriguez

Electrician Wire Tool
Worth Considering
🔧 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.

More Wire Size Calculator apps to explore

4
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
5
Mike Holt's Electrical Toolbox
Mike Holt's Electrical Toolbox
Mike Holt's Electrical Toolbox
Electrical Power Calculator
Free

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.

Conductor sizingVoltage drop limitationsCircuit protection sizing
🔧 Utilities
(197)
free
6
Electrical Calculations
Electrical Calculations
Electrical Calculations
by Egal Net di Ettore Gallina
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
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
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
9
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
10
SIMpull 600V Calculator
SIMpull 600V Calculator
SIMpull 600V Calculator
Southwire Calculator
Free

This app offers multiple calculators for electrical calculations, all linked by wire pull characteristics. It generates NEC® compliant answers for voltage drop, ground wire sizing, ampacity adjustments, and more. Results can be easily emailed.

Voltage Drop CalculatorGround Wire SizingAmpacity Adjustments
🔍 Reference
(57)
free
11
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
12
Cable Picker
Cable Picker
Cable Picker
Size the cable in seconds
Free
🎨 Graphics & Design
(0)
13
WireStix Electrical Calculator
WireStix Electrical Calculator
WireStix Electrical Calculator
Electrical Sizing Made Easy
Free

This app simplifies electrical calculations for professionals and DIYers. It provides quick lookups for current, ampacity, and conduit-fill, applying de-rating based on NEC tables. It also serves as a training aid and integrates with a physical wire gauge tool.

Fast electrical sizing calculationsLookup current and ampacityConduit-fill calculations
🔧 Utilities
(1)
free with in-app purchases
14
Electrical Wiring Pro 2017
Electrical Wiring Pro 2017
Electrical Wiring Pro 2017
Calcs, Refs - Electrical Pros
Free

This app provides electrical calculations and references based on the 2017 Electrical Code. It supports multiple code versions and offers features for wire sizing, box fill, conduit fill, residential load calculations, and voltage drop.

2017 Electrical Code supportAmpacity and wire sizingBox fill and wire bending space
📊 Productivity
(32)
free
15
Electrical Calculator lite
Electrical Calculator lite
Electrical Calculator lite
60 Calculators & 16 Converters
Free

This comprehensive tool offers over 60 calculators and 16 converters for electrical engineering, wiring, and circuit analysis. It supports engineers, electricians, students, and hobbyists with calculations ranging from basic Ohm's Law to complex RLC circuits and power conversions.

60+ Electrical Calculators16 Electrical Unit ConvertersOhm's Law Calculations
🔧 Utilities
(570)
free with in-app purchases
16
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
17
Concrete Calculator Plus
Concrete Calculator Plus
Concrete Calculator Plus
by Inch Calculator
Free

This app provides 15 calculators for estimating concrete, blocks, mortar, rebar, and gravel. It supports various shapes and units, offering material cost estimations for construction projects.

15 concrete estimation calculatorsEstimates cubic yards or bagsCalculates material costs
🔧 Utilities
(21K)
ad-supported
18
Southwire® Conversion Calc
Southwire® Conversion Calc
Southwire® Conversion Calc
Southwire
Free

This utility app facilitates conversions between copper and aluminum electrical wiring. It allows users to calculate pricing, unit of measure, conversion factors, and weight based on product length. The app comes preloaded with numerous cable types for easy calculation.

Copper to aluminum conversionAluminum to copper conversionPricing unit of measure calculation
🔧 Utilities
(5)
free
19
ElectriCalc Pro
ElectriCalc Pro
ElectriCalc Pro
Electrician NEC Calculator
Free
$29.99 | 100% OFF

This app provides electricians and electrical professionals with a powerful tool for performing complex calculations based on the latest National Electrical Code (NEC). It offers solutions for wire sizing, voltage drop, conduit sizing, and motor calculations, saving time and ensuring code compliance.

NEC compliant calculationsWire and conduit sizingVoltage drop calculations
🔧 Utilities
(256)
free with in-app purchases
20
Tape Measure Calculator Pro
Tape Measure Calculator Pro
Tape Measure Calculator Pro
Measuring Math Made Easy
$3.99

Perform complex calculations directly on a visual tape measure. Easily add, subtract, multiply, and divide measurements, mixing decimals and fractions. Get results in inches, feet, and centimeters, in both decimal and fractional formats, saving time and preventing errors.

Visual tape measure calculationsAdd, subtract, multiply, divide measurementsMix decimals and fractions
🔧 Utilities
(2.1K)
paid

FAQ about Wire Size Calculator

What are the best wire size calculator apps for iPhone?
Southwire® Voltage Drop Calc tops our wire size calculator apps ranking as of June 2026, with a 4.6-star average from 1.5K App Store ratings, and it's free to download.
Yes — 17 of the top wire size calculator apps we rank are free to download, including Southwire® Voltage Drop Calc and Wire Gauge & Size Calculator.
Southwire® Voltage Drop Calc has no ads and has no in-app purchases, according to its App Store listing as of June 2026.
We track 222+ wire size calculator apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.
This app helps you determine the correct wire size for electrical circuits. It calculates the appropriate wire size based on specified voltage drop limits and the current carrying capacity (ampacity) of the circuit, ensuring compliance with National Electrical Code (NEC) standards.
The app allows you to determine the wire size needed to meet specific voltage drop limits. It can also calculate the voltage drop for a given conductor run. Calculations are limited by both voltage drop and NEC ampacity, and it supports AWG and KCMIL wire sizes.

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