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

4.9 out of 5
7 Ratings
7 Ratings
James Oliver ,

Great app, well set out easy to use

Great app, well set out easy to use

Shmeared ,

Great app very handy

Great app does what is should, what more could you add to that.

Sparky8317 ,


This app is great for my electrical apprenticeship
Thanks Scotty


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

    Up to six family members will be able to use this app with Family Sharing enabled.

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