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Ohm's Law Calculators and Formulas

Before clicking for the answer, enter numbers into the equation you wish to use to calculate for Current, Power, Resistance, or Voltage. *Updated January 8, 2011 to accept/change commas to periods for those that use commas as decimal separators.

Ohm's Law Calculators
Current (I) Calculators
Power (P) Calculators
Resistance (R) Calculators
Voltage (E) Calculators

Ohm's Law
Ohm's Law Pie Chart



Calculate for Current (I)
I = P / E
Power Voltage Current
Watts Volts Amps
I = Square Root of (P / R)
Power Resistance Current
Watts Ohms Amps
I = E / R
Voltage Resistance Current
Volts Ohms Amps


Calculate for Power (P)
P = I 2 x R
Current Resistance Power
Amps Ohms Watts
P = E x I
Voltage Current Power
VoltsAmpsWatts
P = E 2 / R
Voltage Resistance Power
VoltsOhmsWatts


Calculate for Resistance (R)
R = P / I 2
PowerCurrent Resistance
WattsAmpsOhms
R = E / I
VoltageCurrent Resistance
VoltsAmpsOhms
R = E 2 / P
VoltagePower Resistance
VoltsWattsOhms


Calculate for Voltage (E)
E = I x R
CurrentResistance Voltage
AmpsOhmsVolts
E = P / I
PowerCurrent Voltage
WattsAmpsVolts
E = Square Root of (P x R)
PowerResistance Voltage
WattsOhmsVolts


Ohm's Law Pie Chart
Ohm's Law Calculators







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BasicsCar AudioCar SecurityCruise ControlsDiodesDoor LocksOhm's LawPassive CrossoversRelaysResistorsSubwoofer Enclosures Search
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
Application GuideCalculators, Charts, DiagramsDownloads/ManualsFind InstallersForumsGlossarySubwoofer WiringToolsVehicle Wiring Recent Topics
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