Power Calculator

These calculators perform calculations associated with power (wattage). The bottom one calculates power dissipated in a resistor given the current flowing through it.

Calculate Power from Voltage & Current (P = V * I):

Enter Voltage:        Volts Millivolts Microvolts				Power = Watts
Enter Current:        Amps Milliamps Microamps

Calculate Voltage from Power & Current (V = P / I):

Enter Power:        Watts Milliwatts Microwatts				Voltage = Volts
Enter Current:        Amps Milliamps Microamps

Calculate Current from Power & Voltage (I = P / V):

Enter Power:        Watts Milliwatts Microwatts				Current = Amps
Enter Voltage:        Volts Millivolts Microvolts

Calculate Power Dissipated in a Resistor (P = I² * R):

Enter Current:        Amps Milliamps Microamps					Power = Watts
Enter Resistance:        Ohms Kilohms Megohms

Page last modified: 02 June 2008
Copyright © Simon Carter 1999-2008
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