Comparison

ElectriCalc Pro vs Mike Holt's Electrical Toolbox

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

Head to head
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

About

Mike Holt's Electrical Toolbox

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.

Highlights
  • Conductor sizing
  • Voltage drop limitations
  • Circuit protection sizing
  • Race sizing
  • Equipment grounding conductor sizing
  • Dwelling-unit service calculations
Features
Read full description

Mike Holt, the industry leader in the electrical industry (MikeHolt.com) has created an amazing, practical and useful app for the electrician, inspector, instructor, contractor and engineer. The app contains conductor sizing (including voltage drop limitations), circuit protection sizing, race sizing, equipment grounding conductor sizing for electric heating equipment (commercial and Residential), air-conditioning equipment (commercial and Residential), motors (commercial and Residential), Transformers (commercial) , and dwelling-unit service calculations and sizing.

Screenshots

ElectriCalc Pro4 screens
Mike Holt's Electrical Toolbox4 screens

Verdict

The call

The clearest difference is in-app purchases: Mike Holt's Electrical Toolbox at none against ElectriCalc Pro's 2. Mike Holt's Electrical Toolbox also leads on update cadence (every 3 months vs every 10 months). ElectriCalc Pro's advantage is rating (4.9 vs 4.6). On price, review sentiment, ratings volume and ads 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. Mike Holt's Electrical Toolbox 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 — 368 and 198 respectively. Written reviews point the same way: 78% of ElectriCalc Pro's written reviews are positive against 77% of Mike Holt's Electrical Toolbox's.

UpkeepUpdate frequency

ElectriCalc Pro ships an update every 10 months, Mike Holt's Electrical Toolbox every 3 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 6 level
ElectriCalc Pro versus Mike Holt's Electrical Toolbox: the parameters behind the verdict, then further details
ParameterElectriCalc ProMike Holt's Electrical Toolbox
PriceFreeFree
Rating4.9 (368 ratings) — better4.6 (198 ratings)
Positive reviews78.1% of reviews — better76.7% of reviews
Number of ratings368 — better198
Update frequencyEvery 10 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.014.0
Further details — not scored
Size29 MB26 MB
Age rating12+4+
DeveloperCalculated IndustriesMike Holt Enterprises

Customer experience

ElectriCalc Pro

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

Mike Holt's Electrical Toolbox

All ratings197 ratings
Positive90.4%
Neutral1.5%
Negative8.1%
Written reviews30 reviews
Positive76.7%
Neutral6.7%
Negative16.7%

User reviews

ElectriCalc Pro

From 368 App Store ratings

What we love

  • 👍 Great app overall
  • 👍 Excellent electrical engineering application
  • 👍 Great tool for engineering teams
  • 👍 Useful in daily work activities
  • 👍 Continuously improving with new functions

Room to improve

  • 👎 Recurring costs are disliked
  • 👎 Not worth it if you have the actual calculator
  • 👎 App should include current NEC
  • 👎 High cost for difficulty of use
  • 👎 No longer works after iOS update

Mike Holt's Electrical Toolbox

From 198 App Store ratings

What we love

  • 👍 Great app for electricians
  • 💡 Provides code article references
  • 👍 Useful for on-the-spot reference
  • 👍 Excellent for verifying calculations
  • 👍 Helpful for exam preparation

Room to improve

  • 🐛 Emailing results not working
  • 🐛 Outdated information
  • 🐛 Load calc a little clunky
  • 🐛 Content setup needs overhaul
  • 🐛 Video series lacks completion system

Bugs and requests

ElectriCalc Pro

Reported bugs

5 issues
  • No active subscriptions error after iOS update
  • HP calculations not working
  • App closes when calculating conduit size
  • Wire size calculation crashes the app
  • Fails when entering HP

Requested features

2 requests
  • Option to print
  • Metric wire size (mm2)

Mike Holt's Electrical Toolbox

Reported bugs

4 issues
  • Cannot email results
  • Video player widescreen exit bug
  • Previous calculation data not erased
  • App content is outdated

Requested features

6 requests
  • Increase transformer capacity to 225kva
  • Add option to print load calc
  • Update to NEC 2020
  • Add completion system for video series
  • Refine user interface for better usability
Show 1 more
  • Add more features, willing to pay extra

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
None

Mike Holt's Electrical Toolbox

No in-app purchases

Questions

Is ElectriCalc Pro free?
ElectriCalc Pro is free to download, with in-app purchases available.
Is Mike Holt's Electrical Toolbox free?
Mike Holt's Electrical Toolbox is free to download, with no in-app purchases.
Which has better reviews, ElectriCalc Pro or Mike Holt's Electrical Toolbox?
ElectriCalc Pro is rated higher. ElectriCalc Pro averages 4.9 out of 5 from 368 ratings, while Mike Holt's Electrical Toolbox averages 4.6 from 198 ratings.
Do ElectriCalc Pro or Mike Holt's Electrical Toolbox have ads?
Neither ElectriCalc Pro nor Mike Holt's Electrical Toolbox shows ads.
Which is updated more often, ElectriCalc Pro or Mike Holt's Electrical Toolbox?
ElectriCalc Pro ships an update every 10 months, and Mike Holt's Electrical Toolbox every 3 months. Most recently, ElectriCalc Pro was updated on November 1, 2026 and Mike Holt's Electrical Toolbox on November 6, 2026.

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