Electrical Formulator
Historycentral.com Productivity iPhoneiPadiPod touch
Electrical Formulator is a free Productivity app for iPhone and iPad by Historycentral.com. Rated 5.0/5 from 1 ratings. Requires iOS 18.4.
- Rating
- 5.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 16 MB
- Age 4+
- Updated
- Jun 9
- 2025 · v6.0
Screenshots
About Electrical Formulator
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.
What’s new
Version 6.0 · Updated June 9, 2025
Completely rewritten from scratch. New interface, ability to save multiple results, and ability to export results.
App privacy
The developer, Historycentral.com, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
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| App | Rating | Price | Last updated |
|---|---|---|---|
| Electrical Formulator | 5.0 / 5 (1 rating) | Free | June 9, 2025 |
| Electric circuit calculator | 4.3 / 5 (11) | Free | Aug 26, 2026 |
| Electrical & Solar Calculator | – | Free | Sep 3, 2026 |
| Prysmian Group Voltage Drop | 5.0 / 5 (6) | Free | May 7, 2026 |
| Prysmian Group Conductor Amps | 5.0 / 5 (3) | Free | May 7, 2026 |
| Electric Master: NEC Panel | 3.6 / 5 (5) | Free | Sep 20, 2026 |
| Electrical Tools & Reference | 4.6 / 5 (30) | Free | Jul 14, 2025 |