Best Apps For Wire Sizing And Ampacity

199+ iOS apps curated and reviewed

4.5 avg rating
18 free apps
Updated June 2026

Wire Gauge & Size Calculator is the household name in apps for wire sizing and ampacity, but it's far from the only option. We track 199+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Apps For Wire Sizing And Ampacity

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.

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

More Apps For Wire Sizing And Ampacity apps to explore

4
Wire & Load
Wire & Load
Wire & Load
Wire size, breaker, drop
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5
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
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6
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
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7
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
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8
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
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9
HAK Cable Size Estimator
HAK Cable Size Estimator
HAK Cable Size Estimator
Cable sizing, voltage drop
Free

This utility app assists engineers in accurately calculating power cable sizes based on ampacity and voltage drop. It supports various system types, materials, and includes features for parallel runs and motor current estimation. Calculations are performed offline and results are presented with a concise math trace.

Ampacity-based cable sizingVoltage drop calculation (R-only or R+X)Support for single and three-phase systems
🔧 Utilities
(1)
freemium
10
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
11
WireCalc - Wire Sizing
WireCalc - Wire Sizing
WireCalc - Wire Sizing
Voltage Drop & Conduit Fill
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12
NG Wire
NG Wire
NG Wire
NG Orange LLC
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
(5)
subscription
13
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
14
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
15
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
(411)
free with in-app purchases
16
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
17
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
18
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
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(7)
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19
City Electric Supply
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City Electric Supply
Local Electric Wholesale
Free

Manage your account and streamline your work with this app. It offers contactless order signing, access to exclusive promotions, and easy invoice payments. Find nearby branches and access helpful electrical reference materials.

Contactless order signingExclusive promotions accessInvoice payment
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(27)
free
20
Prysmian Group Conductor Amps
Prysmian Group Conductor Amps
Prysmian Group Conductor Amps
Electrical Conductor Ampacity
Free

This tool helps electrical professionals quickly determine conductor ampacities based on various temperature ratings and electrical codes. It supports different conductor types, materials, and ambient temperature adjustments for accurate calculations.

Conductor ampacity calculationNEC code selection (2011, 2014, 2017)Metric or standard conductor options
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(3)
free