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the12volt.com - Free Technical Information for Mobile Electronics Installers
Ohm's Law: Calculators

Before clicking for the answer, enter numbers into the equation you wish to use to calculate for Current, Power, Resistance, or Voltage.

Calculators
• Current (I)
• Power (P)
• Resistance (R)
• Voltage (E)
• 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
Volts Amps Watts
P = E 2 / R
Voltage Resistance Power
Volts Ohms Watts


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


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


• Ohm's Law Pie Chart
• Ohm's Law Calculators





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