Comparison

Southwire® Voltage Drop Calc vs ElectriCalc Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Southwire® Voltage Drop Calc

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.

Highlights
  • Determine wire size for voltage drop
  • Calculate voltage drop for conductor runs
  • Limit wire size by voltage drop
  • Limit wire size by NEC ampacity
  • Supports AWG and KCMIL sizes
Features
Read full description

Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.

About

ElectriCalc Pro

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.

Highlights
  • NEC compliant calculations
  • Wire and conduit sizing
  • Voltage drop calculations
  • Motor full-load amps
  • Ohm's Law solver
  • Built-in help and tutorials
Features
Read full description

FREE Try Before You Buy trial, your App Store account is not charged by Apple during the free trial. Electrical Contractors, Designers, Electricians, and Lighting Specialists solve tough electrical calculations in seconds and deliver those solutions in conformance with the latest NEC®. The ElectriCalc Pro electrical code calculator is compliant with 2023, 2020, 2017, 2014, 2011, 2008, 2005, 2002, 1999, and 1996 NEC®. The official US-based National Electrical Code® (NEC) ElectriCalc Pro from Calculated Industries for iOS is a full-featured emulation of our popular #5065/#5070 models. ----- Full Functionality of our Pro Handheld Calculator ----- • Experience the power of a professional calculator on your iPhone. • ElectriCalc Pro replicates all features & solutions of our top-rated handheld model. ----- Built-in Help & Tutorials ----- • Press and hold any key for clear definitions, examples, and usage guides. • A complete user manual is also available. ----- Complete Electrical Reference Tool ----- • Save time, trouble, and money with ElectriCalc Pro's comprehensive electrical reference data. • All the info you need for calculations and code compliance is built into one app. The ElectriCalc Pro is a complete electrical reference tool that will save time, trouble, and money. ElectriCalc Pro Solutions: • Wire Sizes • Voltage Drop • Conduit Sizing • Motor Full-Load Amps • Fuse and Breaker Sizes • Service and Equipment Grounding Conductor Sizes • Parallel Resistance • Ohm’s Law Calculations – enter any two values to solve for the third • Circular MILS wire sizes ElectriCalc Pro Calculations: • Work directly in and convert between Amps, Watts, Volts, Volt-Amps, kVA, kW, PF% and EFF%, and DC Resistance • Calculate wire sizes per NEC® 310-16 and 310-17; Copper or aluminum, 3Ø/1Ø, 60°C, 75°C, 90°C insulation ratings and 100% or 125% of ampacity. Can also adjust wire sizes for ambient temperatures other than 30◦ C and more than three wires in a raceway • Integrated voltage drop solutions. Find minimum VD wire size, maximum length for any given wire size, drop percentage, actual number and percentage of Volts dropped • Conduit sizing for 12 types of conduit. Plus, it gives fill percentages, cross-sectional areas, remaining areas, and more • Find Motor Full-Load Amps per current NEC®. Works in 1Ø and 3Ø with the newly expanded tables for 3Ø induction (to 500 hp), synchronous (to 200 hp), and DC motors per NEC® 430-247, 430- 248 and 430-250 • Calculates Fuse and Breaker Sizes per NEC® 430-52 • Parallel and derated wire sizing • Parallel Resistance • NEC Table number displays when performing Wire Size calculations • Sizes overload protection per NEC® 430-32 • Automatically finds NEMA starter sizes • Calculates service and equipment grounding conductor sizes per NEC®: 250-122 and 250-66. • Enter BTU to find Kilowatts per Hour • Enter Kilowatts per Hour to find BTU • Ohm’s Law Calculations – enter any two values to solve for the third • Enter, solve, or convert to Circular MILS wire sizes Note: Electrical math is universal. However, code-based sizing solutions are based on the US National Electrical Code® (NEC); users in other countries should check with their local Code Officials for applicability. SUBSCRIPTION INFORMATION The first seven days are free. Subscriptions offered will automatically renew at the end of the chosen period. Upon purchase confirmation and completion of a free trial, payment will be charged to your Apple account. The subscription will automatically renew unless auto-renew is turned off or the subscription is canceled in settings at least one day (24 hours) before the subscription period ends. You can manage your subscription and turn off auto-renewal in your Apple account Settings > Account (Apple ID) > Subscriptions. TRADEMARKS ElectriCalc(TM) and Calculated Industries® are trademarks and registered trademarks of Calculated Industries, Inc. Copyright 2024

Screenshots

Southwire® Voltage Drop Calc4 screens
ElectriCalc Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: Southwire® Voltage Drop Calc at none against ElectriCalc Pro's 2. Southwire® Voltage Drop Calc also leads on update cadence (every 2 months vs every 10 months) and ratings volume (1.5K vs 364). ElectriCalc Pro's advantage is review sentiment (78% vs 48%) and rating (4.9 vs 4.6). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ElectriCalc Pro sells 2 in-app purchases, starting at $4.99 per month. Southwire® Voltage Drop Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ElectriCalc Pro holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 1.5K and 364 respectively. Written reviews point the same way: 48% of Southwire® Voltage Drop Calc's written reviews are positive against 78% of ElectriCalc Pro's.

UpkeepUpdate frequency

Southwire® Voltage Drop Calc ships an update every 2 months, ElectriCalc Pro every 10 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

Scorecard6 real differences · 4 level
Southwire® Voltage Drop Calc versus ElectriCalc Pro: the parameters behind the verdict, then further details
ParameterSouthwire® Voltage Drop CalcElectriCalc Pro
PriceFreeFree
Rating4.6 (1.5K ratings)4.9 (364 ratings) — better
Positive reviews48.1% of reviews78.1% of reviews — better
Number of ratings1.5K — better364
Update frequencyEvery 2 months — betterEvery 10 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size10 MB29 MB
Age rating4+12+
DeveloperSouthwire CompanyCalculated Industries

Customer experience

Southwire® Voltage Drop Calc

All ratings1,358 ratings
Positive89.7%
Neutral2.2%
Negative8.1%
Written reviews52 reviews
Positive48.1%
Neutral3.8%
Negative48.1%

ElectriCalc Pro

All ratings354 ratings
Positive98.9%
Neutral0.3%
Negative0.8%
Written reviews32 reviews
Positive78.1%
Neutral6.3%
Negative15.6%

Bugs and requests

Southwire® Voltage Drop Calc

Reported bugs

24 issues
  • Useless!
  • Won't work
  • How to use
  • Confused
  • Bad app
Show 19 more
  • Bad
  • Not applicable for Residential
  • Electrician
  • Terrible
  • Not working
  • What??
  • Terrible
  • Don't work
  • Terrible
  • Choice Between AWG and Metric wire Gauge
  • Updated app not so simple
  • The last version was better
  • App
  • Terrible
  • Voltage drop calculator
  • IOS 8
  • One flaw
  • Worst app ever
  • Average

Requested features

2 requests
  • Motor starting Voltage drop calculation
  • Metric wire size options

ElectriCalc Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Southwire® Voltage Drop Calc

No in-app purchases

2 purchases

ElectriCalc Pro

Subscriptions2
  • 1 Month Full Access7 Days trial$4.991 Month
  • 1 Year Full Access7 Days trial$39.991 Year

Questions

Is Southwire® Voltage Drop Calc free?
Southwire® Voltage Drop Calc is free to download, with no in-app purchases.
Is ElectriCalc Pro free?
ElectriCalc Pro is free to download, with in-app purchases available.
Which has better reviews, Southwire® Voltage Drop Calc or ElectriCalc Pro?
ElectriCalc Pro is rated higher. Southwire® Voltage Drop Calc averages 4.6 out of 5 from 1.5K ratings, while ElectriCalc Pro averages 4.9 from 364 ratings.
Do Southwire® Voltage Drop Calc or ElectriCalc Pro have ads?
Neither Southwire® Voltage Drop Calc nor ElectriCalc Pro shows ads.
Which is updated more often, Southwire® Voltage Drop Calc or ElectriCalc Pro?
Southwire® Voltage Drop Calc ships an update every 2 months, and ElectriCalc Pro every 10 months. Most recently, Southwire® Voltage Drop Calc was updated on October 24, 2026 and ElectriCalc Pro on October 23, 2026.

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