Comparison

Electrical Formulator vs Prysmian Group Voltage Drop

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

Head to head
About

Electrical Formulator

This app provides a comprehensive suite of electrical calculation tools for design and engineering challenges. It offers hundreds of conversion and calculation options, with features to save, print, and email results. Easily access frequently used and recently accessed formulas, with all calculations automatically stored.

Highlights
  • Over 100 electrical formulas
  • Save and organize results
  • Share results via email or print
  • Access most-used and recent formulas
  • Supports US/Imperial and metric units
  • Formula categories for batteries, motors, transformers, and more
Features
Read full description

Electrical Formulator: Your Complete Electrical Calculation Tool Solve virtually any electrical design or engineering challenge with this powerful and intuitive electrical formulator. Packed with hundreds of conversion and calculation tools, it’s the most versatile utility in your toolkit. Save, print, or email your results. Easily access your most-used and recently used formulas. Every calculation is automatically saved for future reference. Key Features: • Instant access to over 100 professional-grade electrical formulas • Save and organize your results for later reference • Share results via email or print • Highlights your most-used and recent formulas • Designed for engineers, electricians, and energy professionals Formula Categories: Batteries • Starting motor amperage • Number of cells required • Estimated operating time Cost Calculations • Appliance and lighting energy usage • Estimated usage hours for new bulbs • Insulation payback period BTU Conversions • BTU to joules, horsepower-hr, watt-hr, calories, foot-pounds, and more Generator Calculations • DC generator output • Generator amperage and efficiency Impedance & Reactance • Resistance & reactance combinations • Inductive and capacitive reactance • Total impedance and parallel circuits Kilowatts & Joules • Convert kilowatts to BTU/hr, joules/sec, lumens, horsepower, megajoules/hr, and more Motors • Single- and three-phase motor calculations • Locked rotor current • Motor kVA (including multiple input scenarios) • Motor speed analysis Ohm’s Law • Calculate for power, voltage, resistance, or current Transformers • Primary and secondary amperage • Full-load transformer sizing (208V, 240V, 480V for single and three-phase) • Impedance and amperage capacity calculations Voltage Drop • Copper and aluminum wire voltage drop (1-phase and 3-phase) • US/Imperial and metric units supported Wiring & Conduits • Wire size and resistance (copper and aluminum) • Wire length calculations • Conduit sizing Whether you’re working in the field, the lab, or the classroom, this electrical formulator helps you work faster, smarter, and with confidence. Users are able to calculate twelve formulas for FREE. Purchase a subscription to calculate additional formulas. All subscriptions come with a 1-WEEK FREE TRIAL and SUPPORT Family Sharing.

About

Prysmian Group Voltage Drop

Calculate maximum circuit distance and minimum conductor size for required voltage drop. Designed for electrical professionals, it provides detailed information on conductor size, voltage loss, and amperage based on NEC standards.

Highlights
  • Calculate Maximum Circuit Distance
  • Determine Minimum Conductor Size
  • View Actual Voltage Loss
  • NEC Code Selection (2011, 2014, 2017)
  • Metric or Standard Conductors
  • Amperage Calculations
Features
Read full description

Prysmian Group’s Voltage Drop Calculator is a quick and easy tool to find Maximum Circuit Distance and Minimum Conductor Size for the required voltage drop. It is designed for contractors, electricians, and other electrical professionals. The minimum conductor size section will show the required conductor size, actual voltage loss, maximum allowable voltage loss, and maximum amps for the conductor. The amperage values are from the NEC® table T310.15 (B) (16) 75°C rating. Conductor sizes are determined based on the amperage value provided by the user and not the expected loads which in some scenarios may result in a larger conductor size. The Maximum Circuit Distance section shows maximum circuit distance, allowable voltage loss, actual voltage loss, and maximum amps of the selected conductor. Code Selection for NEC® 2011, 2014, and 2017. Metric or standard conductors

Screenshots

Electrical Formulator4 screens
Prysmian Group Voltage Drop4 screens

Verdict

The call

Electrical Formulator and Prysmian Group Voltage Drop both sit at 5.0 stars, but that hides the real split: 100% of Prysmian Group Voltage Drop's written reviews are positive against 16% of Electrical Formulator's. Prysmian Group Voltage Drop also leads on in-app purchases (none vs 1) and ratings volume (6 vs 1). Electrical Formulator's advantage is update cadence (every 2 months vs every 7 months). On price, rating, 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

Both are free to download. Electrical Formulator sells 1 one-off in-app purchase. Prysmian Group Voltage Drop asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Electrical Formulator against 5.0 for Prysmian Group Voltage Drop. That said, the two scores are not equally well evidenced: Prysmian Group Voltage Drop has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 16% of Electrical Formulator's written reviews are positive against 100% of Prysmian Group Voltage Drop's.

UpkeepUpdate frequency

Electrical Formulator ships an update every 2 months, Prysmian Group Voltage Drop every 7 months. The most recent releases landed on September 3, 2026 and June 3, 2026 respectively.

Scorecard6 real differences · 4 level
Electrical Formulator versus Prysmian Group Voltage Drop: the parameters behind the verdict, then further details
ParameterElectrical FormulatorPrysmian Group Voltage Drop
PriceFreeFree
Rating5.0 (1 ratings)5.0 (6 ratings)
Positive reviews16.1% of reviews100.0% of reviews — better
Number of ratings16 — better
Update frequencyEvery 2 months — betterEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.411.0 — better
Further details — not scored
Size16 MB8 MB
Age rating4+4+
DeveloperHistorycentral.comPrysmian Group

Customer experience

Electrical Formulator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews31 reviews
Positive16.1%
Neutral6.5%
Negative77.4%

Prysmian Group Voltage Drop

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Electrical Formulator

One-time1
  • Pro Features For Electrcial$1.99
None

Prysmian Group Voltage Drop

No in-app purchases

Questions

Is Electrical Formulator free?
Electrical Formulator is free to download, with in-app purchases available.
Is Prysmian Group Voltage Drop free?
Prysmian Group Voltage Drop is free to download, with no in-app purchases.
Which has better reviews, Electrical Formulator or Prysmian Group Voltage Drop?
Electrical Formulator and Prysmian Group Voltage Drop are both rated 5.0 out of 5 on the App Store, from 1 and 6 ratings respectively.
Do Electrical Formulator or Prysmian Group Voltage Drop have ads?
Neither Electrical Formulator nor Prysmian Group Voltage Drop shows ads.
Which is updated more often, Electrical Formulator or Prysmian Group Voltage Drop?
Electrical Formulator ships an update every 2 months, and Prysmian Group Voltage Drop every 7 months. Most recently, Electrical Formulator was updated on September 3, 2026 and Prysmian Group Voltage Drop on June 3, 2026.

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