Makes Ohm's Law simple!

Ohmulator is a simple, yet robust, electric circuit calculator that enables you to quickly and easily find the unknown variables of a circuit.

Ohmulator allows you to easily adjust unit types on the fly (eg. milli Amps, Amps, kilo Amps), which means no prior conversion!

Enter two known variables (from: I = Current, R = Resistance, V = Voltage, P = Power), set preferred units, then Ohmulator will calculate and return the previously unknown values.

Also an Effective (total) Resistance calculator.

What two App Store reviewers had to say about Ohmulator:

"Great. Does what it says. Very good app. Stylish design." 5 Stars - Jamie1990jamie

"Awesome app. It simply works. A must have for the radioamateur or electronic nerd. Nice to have the watt law as well." 5 Stars - Per67

Also available for OS X on the Mac App Store.

Follow @ArmchairEng on Twitter to keep up to date with news and developments.

What’s New

Version 2.2

- iPhone X support
- Added number pad appearance settings
- Bug fixes

Ratings and Reviews

4.6 out of 5
36 Ratings

36 Ratings

Jesse Coulter ,

Works great, easy to use.

Ohmulator does everything I need it to. I mostly use it for calculating power and current on my coil builds. Helps me ensure my mod doesn't turn into a pipe bomb!

El Nerdo Degeek ,

Works excellent

Could use way more algorithms though.

kennyrocket ,

The Best

Great app while in school for HVAC


David Caddy
3.7 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2010-2018 David Caddy


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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