OHMs Law Calc

Calculates OHM's Law for Single and Three Phase Applications. This app uses proper vector calculations to accurately calculate BOTH balanced and unbalanced Three Phase loads. Calculate Watts, Volts, Amps or Ohms easily and quickly. Back calculate Load resistance from voltage and Phase Amps. Just pick a wedge from the OHM's law circle and go! NOW WITH WIDGET SUPPORT!

Category	Price	Seller	Device
Reference	$1.99	Jonathan Mellen	iPhone, iPad, iPod

Reviews

Great
Alia of the knife

Great app, so easy to use!! Saves tons of time. Love the three phase value calculator!!!!!

3 Phase Values At Last!
Bethhawking2012

Great app. The only app that I've found that properly calculates 3 phase values.

Wow.
alexandreamel

3 Phase works!!! Finally an app with 3 phase that works. Great app, highly recommended. Very easy to use UI, saves a lot of time and mistakes. Helpful guide provided on website as well. A must have.

Draftmen
JPerley

This is a very good calculator one of the best I have ever used . Very well done.

awesome
Hosboss2002

works just like described, it does 3phase and single phase. It's also iphone and ipad compatible. 5 start app all the way

Best ohms law app I have ever used!
Msweany

This is the best ohms law app I have in my electronics folder! I really like this app! Good job!A+

Sparky
Nickname taken(v1.1)

A lot of better free apps out there! Waste of money! Wish I can take my Money back.

Incorrectly calculates for AC
DOFFUTT

Good attempt, but this calculator works 100% correctly ONLY for DC. For AC, it ignores Power Factor (PF), caused by ever present out-of-phase Reactive currents. All AC "Power" results are really in "Volt-Amps" (VA) not Watts. For 3-Ph AC it incorrectly calculates VA, when given Voltage & Current. The correct method is: V x A x 1.73 (Sq Root of 3) = VA Power in Watts is then: VA x PF = Watts PF is always a number between 0 & 1, with 1 being in-phase (purely resistive) current, and 0 being 90 deg out-of-phase (purely reactive) current. For calculations (where actual PF is unknown) a PF of 0.8 is typically used. Resistance alone in never the only factor in AC Circuits.

Quick and Easy!
Talobab

This app really does calculate Three Phase correctly... Not just using the old "lazy engineers" trick of multiplying by 1.732... But rather doing the actual VECTOR MATH to properly calculate BOTH balanced and unbalanced loads. Works great for resistive AC circuits too! The app does exactly what it says, makes single and three phase calculations a breeze. I'll never get the wrong Three Phase Breaker again!