Best Wire Sizing Apps

246+ iOS apps curated and reviewed

4.5 avg rating
14 free apps
Updated August 2026

Finding the right wire sizing apps can be overwhelming with so many options. We've analyzed 246+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Wire Sizing Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Southwire® Voltage Drop CalcSouthwire® Voltage Drop CalcFree4.6★ (1.5K)NoNoAug 2026
2Wire Gauge & Size CalculatorWire Gauge & Size CalculatorFree4.9★ (13)YesNoAug 2026
3Mike Holt's Electrical ToolboxMike Holt's Electrical ToolboxFree4.6★ (197)NoNoAug 2026
4WireCalc - Wire SizingWireCalc - Wire Sizing$1.99NoNoJun 2026
5AWG Calculator: Wire SizeAWG Calculator: Wire SizeFree4.7★ (69)NoYesSep 2026
6DC Wire SizerDC Wire Sizer$2.995.0★ (23)NoNoAug 2026
7Wire Size CalcWire Size Calc$0.99NoYesAug 2026
8Circuit WizardCircuit WizardFree3.1★ (19)NoNoMay 2026

Top Picks for Wire Sizing

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

AWG & mm² · Voltage Drop, Amps
Strong Contender
🔧 Utilities
4.9(13 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#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 Sizing apps to explore

4
WireCalc - Wire Sizing
WireCalc - Wire Sizing
WireCalc - Wire Sizing
Voltage Drop & Conduit Fill
$1.99
🔧 Utilities
(0)
5
AWG Calculator: Wire Size
AWG Calculator: Wire Size
AWG Calculator: Wire Size
NEC, Conduit, Voltage Drop
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
(69)
free with in-app purchases
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
(23)
paid
7
Wire Size Calc
Wire Size Calc
Wire Size Calc
NEC Ampacity & Derating
$0.99
🔧 Utilities
(0)
8
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
9
Lead Wire Ampacity
Lead Wire Ampacity
Lead Wire Ampacity
Southwire Calculator
Free
🔧 Utilities
(0)
10
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
11
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
12
ELSEWEDY Cable Sizing
ELSEWEDY Cable Sizing
ELSEWEDY Cable Sizing
by Elsewedy Electric Company
Free
🔧 Utilities
(0)
13
WireSizer - DC Voltage Drop
WireSizer - DC Voltage Drop
WireSizer - DC Voltage Drop
Wire Gauge & 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
(225)
paid
14
E-Wire Calc
E-Wire Calc
E-Wire Calc
by Elektrisola Dr. Gerd Schildbach GmbH & Co. KG
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
15
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
16
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
17
Phased: Circuit Colors
Phased: Circuit Colors
Phased: Circuit Colors
Electrical Wire Reference App
$0.99

This app helps electricians quickly identify the correct wire colors for various electrical phasing jobs. It offers selections for three-phase and single-phase systems, with adjustable color settings that are remembered for future use.

Three-phase 120/208V wire colorsThree-phase 277/480V wire colorsSingle-phase wire colors
📊 Productivity
(13)
paid
18
FILL ◦ Conduit Fill Calculator
FILL ◦ Conduit Fill Calculator
FILL ◦ Conduit Fill Calculator
NEC 2026 & 2023 Wire Sizing
Free

This app calculates conduit fill percentages based on NEC 2023 standards. It helps electricians determine if wires will fit in a conduit or find the smallest suitable conduit for a given set of wires. Features include real-time status updates, history, and export options.

NEC 2023 compliant calculationsForward and reverse calculation modesReal-time fill percentage status
🔧 Utilities
(3)
free with in-app purchases
19
Erawan Electric Wire & Cable
Erawan Electric Wire & Cable
Erawan Electric Wire & Cable
by Non Pichitwattana
Free
📚 Education
(0)
20
VFD Cable Sizing Calc
VFD Cable Sizing Calc
VFD Cable Sizing Calc
by Southwire Company
Free
🔧 Utilities
(0)

FAQ about Wire Sizing

What are the best wire sizing apps for iPhone?
Southwire® Voltage Drop Calc tops our wire sizing apps ranking as of August 2026, with a 4.6-star average from 1.5K App Store ratings, and it's free to download.
Yes — 14 of the top wire sizing 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 August 2026.
We track 246+ wire sizing apps on the iOS App Store as of August 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.

Related searches