TrueOhm
Electrical Calculator
Free · Designed for iPad. Not verified for macOS.
TrueOhm is a fast, free electrical calculator built for electricians, apprentices, and engineers.
Five powerful calculators in one app:
• Ohm's Law Wheel — Enter any two of voltage, current, resistance, or power and instantly solve the other two.
• AC Power — Calculate real power, apparent power, current, and voltage for single-phase and three-phase systems.
• Power Triangle — Solve the relationship between kW, kVAR, kVA, power factor, and phase angle.
• Energy Cost — Estimate energy consumption and cost for any load over any run time.
• Efficiency — Calculate motor or system efficiency from input and output power.
Every calculation shows its work — tap "How this was calculated" to see the exact formulas and substitutions used. Built-in sanity checks warn you about impossible values without blocking your workflow.
Designed for the field. No ads. No subscriptions. Just fast, accurate calculations from 509 Electric.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Nicole Nalley, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nicole Nalley
- Size
- 1.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 509 Electric LLC