Power Calculator
Calculate electrical power using Ohm's Law formulas
Power Calculator
Calculate electrical power using Ohm's Law formulas
Enter Known Values
Power Calculation Formulas
P = V × I
Need V & I
P = V² / R
Need V & R
P = I² × R
Need I & R
0W
Common Power Ratings
LEDs:20mW - 1W
Small resistors:0.125W - 2W
Op-amps:1mW - 100mW
Microcontrollers:10mW - 1W
Power transistors:1W - 100W+