Ohm's Law calculators for current, voltage, resistance, and power. You may key in two of the four factors in Ohm's Law. They are Power (P) or (W), measured in Watts, Voltage (V) or (E), measured in Volts, Current or Amperage (I), measured in Amps (Amperes), and Resistance (R) measured in Ohms.

The needed factor will be calculated for you when you key in the needed value.

The various possible formulas for Ohm's law are as follows:
P = power in watts
E = voltage in volts
I = current in amps
R = resistance in ohms

P = E2 / R
P = I2 * R
P = E * I

E = sqrt(P * R)
E = P / I
E = I * R

I = E / R
I = P / E
I = sqrt(P / R)

R = E / I
R = E2 / P
R = P / I2

*This is a universal app that work for both iPhone and iPad.

Thanks for your support and do visit for more apps for your iOS devices.

What’s New

Version 1.6

- Update for Newest Devices
- Minor UI Update

Ratings and Reviews

Kalmik94 ,

Not working

Bought this app but when I open it turns black wasted money on this

WT4D ,

Wasted $1.99

What a disappointment ! Just bought this app, and it will not rotate screen view on my iPad.

TangoTT ,

Not Working

App does not work


Tan Chia Ling
16.2 MB

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



Age Rating
Rated 4+
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