Power Dissipation Calculator
Free calculate power dissipated in electrical circuits from voltage, current, and resistance using joule's law.
Input Parameters
V
Leave empty if using V and I
Results
Enter voltage and current to calculate
Power Dissipation Formulas
From V & I
P = V × I
From I & R
P = I² × R
From V & R
P = V² / R
All formulas equivalent (Joule's Law)