Ohmly: Electrical Calculator
Ohm's law, AWG, SMD & more
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
26 pro tools in one clean, ad-free app. Ohm's law, resistor and SMD codes, voltage drop, wire gauge, impedance, 555 timer, and more.
Your electrical toolkit, redesigned for speed. 26 pro tools, one clean app.
Ohmly is the modern electrical calculator for electricians, students, and engineers. Solve VIRP calculations, decode resistor and SMD codes, check voltage drop, size conductors, design circuits, and keep your work organized—without ads.
26 PRO TOOLS
• Ohm's law, resistor color code, SMD resistor code
• Series/parallel resistance, voltage divider, LED resistor
• Reactance, resonance, AC impedance, power factor
• RC/RL/LC filters, decibels, op-amp gain, 555 timer
• Voltage drop, wire gauge/AWG, three-phase power
• Motor FLA, conduit fill, short-circuit current
• Transformer ratio, LM317 regulator
• Capacitor code, inductor color code, PCB trace width
• Heat sink thermal resistance and battery life
WHY OHMLY
• Clean light and dark modes with no ads
• Shared display metrics across every tool
• Save, label, and search calculations
• Export multi-calculation PDF reports
• Home Screen, Lock Screen, and StandBy widgets
• Full Apple Watch companion
Unlock Pro with a lifetime purchase or a low monthly plan.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 2.0 is a full relaunch: a redesigned calculator, 26-tool Pro toolkit, saved history, PDF reports, learning references, widgets, Apple Watch support, display metrics, tool search, and 16 brand-new circuit and field calculators. Every calculator received an accuracy pass against third-party references.
The developer, Adam Wilkie, 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
- Adam Wilkie
- Size
- 7.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
English and 5 more
- English, French, German, Japanese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Ohmly - Lifetime Access $4.99
- Ohmly Pro - Monthly $1.99
- Copyright
- © 2026 Adam Wilkie