Electrical Formulator vs Electrical Motor Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Electrical Motor Calculator
This engineering tool calculates key electrical motor characteristics like amps, horsepower, and kVa. Input system voltage, motor efficiency, and power factor to determine electrical values for your system.
- Calculate amps, horsepower, and kVa
- Input system voltage and motor efficiency
- Converts kilowatts to horsepower
- Defines Power Factor (PF) and Full Load Amps (FLA)
- Calculates Running Load Amps (RLA)
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Electrical Motor Calculator is an engineering tool to calculate amps, horsepower, kilowatt and kVa base on electrical motor formula. Electrical Motor Calculator calculated values and are intended for use as a means of indicating expected values for electrical motor and similar product. Values will vary in service with load conditions, condition, age and type of motor. Electrical Motor Calculator lets you figure out electrical characteristics of your system given a specific motor. By inputting horsepower, kilowatt, motor efficiency, power factor, and system voltage the system will calculate the amps, horsepower, kilowatt and kVa. PF - Power Factor - three phase motors (0 - 100%) or (0.0 - 1.0) FLA - "Full Load Amps" - the amount of current when a motor is at its full rated output power. FLA is the running load + 25%. RLA - "Running Load Amps" - current drawn during normal operation of electric motor. 1 kVA = 1,000 volt amps Kilowatts to horsepower conversion 1 HP = 0.7457 kW 1 kW = 1.34102 HP Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
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Verdict
The clearest difference is price: Electrical Formulator at Free against Electrical Motor Calculator's $2.99. Electrical Formulator also leads on rating (5.0 vs 3.8) and update cadence (every 2 months vs every 43 months). Electrical Motor Calculator's advantage is in-app purchases (none vs 1) and chart position (#174 vs unranked). 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
Electrical Formulator is free to download; Electrical Motor Calculator costs $2.99 up front. Electrical Formulator sells 1 one-off in-app purchase. Electrical Motor Calculator asks for nothing beyond the download.
Electrical Formulator holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Electrical Motor Calculator has 8 ratings behind it against 1, so its average is the more settled of the two.
Electrical Formulator ships an update every 2 months, Electrical Motor Calculator every 43 months. The most recent releases landed on September 3, 2026 and September 21, 2026 respectively.
| Parameter | Electrical Formulator | Electrical Motor Calculator |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 5.0 (1 ratings) — better | 3.8 (8 ratings) |
| Positive reviews | 16.1% of reviews | — |
| Number of ratings | 1 | 8 — better |
| Update frequency | Every 2 months — better | Every 43 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium — better | Paid |
| Best chart rank | — | #174 — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.4 | 13 — better |
| Further details — not scored | ||
| Size | 16 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Historycentral.com | Heng Jia Liang |
Customer experience
Electrical Formulator
Electrical Motor Calculator
In-app purchases
Electrical Formulator
- Pro Features For Electrcial$1.99
Electrical Motor Calculator
No in-app purchases
Questions
Is Electrical Formulator free?
Is Electrical Motor Calculator free?
Which has better reviews, Electrical Formulator or Electrical Motor Calculator?
Do Electrical Formulator or Electrical Motor Calculator have ads?
Which is updated more often, Electrical Formulator or Electrical Motor Calculator?
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