# Ohms Law Calculator

Discussion in 'General Electronics Discussion' started by Ian, Mar 4, 2010.

1. ### IanAdministrator

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Aug 23, 2006
Ohms Law defines the relationship between Voltage, Current and Resistance - as described in detail by this article. The tool on this page allows you to enter two known vaules and then calculate the third.
• E (or V) = Voltage
• I = Current
• R = Resistance
This calculator is based on the following simple equation: Which therefore means the following conditions are also true: [ohmslawcalc][/ohmslawcalc]​

In electric circuits, power is a function of both voltage and current:​ Using algebra again to manipulate the formulae, we can take our original power formula and modify it for applications where we don't know both voltage and current:
If we only know voltage (E) and resistance (R): If we only know current (I) and resistance (R): [ohmslawpowercalc][/ohmslawpowercalc]​

Last edited: Feb 25, 2011
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