Comparison

ElectriCalc Pro vs Box Fill Calc

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

Box Fill Calc

This app simplifies electrical box fill calculations for any job size. It allows users to create and save unlimited calculations, solve for various box sizes, and export results to spreadsheets or print directly. It supports current electrical code standards and includes a built-in construction calculator.

Highlights
  • Unlimited saved calculations
  • Solve for custom and compound boxes
  • Export results to spreadsheet
  • Direct printing via AirPrint
  • Supports 2014 NEC and 2012
  • Built-in construction calculator
Features
Read full description

Box Calc is a fast, easy way to create a schedule of box fill calculations for any size of job or just to perform a single calculation on the fly. Put your pencil down and start making professional, consistent calculations today. - Universal app allows use on both iPad, and iPhone/iPod with single purchase. - Create an unlimited list of calculations that automatically save. - Solve for any size box including custom and compound. - Export your results to a spreadsheet for formatting or printing. - Print directly from the app (requires AirPrint printer). - Support for 2014 NEC and 2012. Built in construction calculator allows intermediate calculations to be performed within the app.

Screenshots

ElectriCalc Pro4 screens
Box Fill Calc4 screens

Verdict

The call

The clearest difference is price: ElectriCalc Pro at Free against Box Fill Calc's $4.99. ElectriCalc Pro also leads on rating (4.9 vs 3.2) and ratings volume (354 vs 5). Box Fill Calc's advantage is in-app purchases (none vs 2) and update cadence (every 3 months vs every 10 months). On ads and device support 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

ElectriCalc Pro is free to download; Box Fill Calc costs $4.99 up front. ElectriCalc Pro sells 2 in-app purchases, starting at $4.99 per month. Box Fill Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ElectriCalc Pro holds the better App Store score, 4.9 against 3.2. That said, the two scores are not equally well evidenced: ElectriCalc Pro has 354 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 78% of ElectriCalc Pro's written reviews are positive against 60% of Box Fill Calc's.

UpkeepUpdate frequency

ElectriCalc Pro ships an update every 10 months, Box Fill Calc every 3 months. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

Scorecard8 real differences · 2 level
ElectriCalc Pro versus Box Fill Calc: the parameters behind the verdict, then further details
ParameterElectriCalc ProBox Fill Calc
PriceFree — better$4.99
Rating4.9 (354 ratings) — better3.2 (5 ratings)
Positive reviews78.1% of reviews — better60.0% of reviews
Number of ratings354 — better5
Update frequencyEvery 10 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.08.0 — better
Further details — not scored
Size29 MB18 MB
Age rating12+4+
DeveloperCalculated IndustriesSnappy Appz Inc.

Customer experience

ElectriCalc Pro

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

Box Fill Calc

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

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

Box Fill Calc

No in-app purchases

Questions

Is ElectriCalc Pro free?
ElectriCalc Pro is free to download, with in-app purchases available.
Is Box Fill Calc free?
Box Fill Calc costs $4.99, with no in-app purchases.
Which has better reviews, ElectriCalc Pro or Box Fill Calc?
ElectriCalc Pro is rated higher. ElectriCalc Pro averages 4.9 out of 5 from 354 ratings, while Box Fill Calc averages 3.2 from 5 ratings.
Do ElectriCalc Pro or Box Fill Calc have ads?
Neither ElectriCalc Pro nor Box Fill Calc shows ads.
Which is updated more often, ElectriCalc Pro or Box Fill Calc?
ElectriCalc Pro ships an update every 10 months, and Box Fill Calc every 3 months. Most recently, ElectriCalc Pro was updated on October 17, 2026 and Box Fill Calc on October 5, 2026.

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