Power Calculator
Calculate Volts, Amps, Watts, or Ohms
Give any 2 values. The other 2 are calculated.
  Input Unit Calculated
Voltage Volts 0 V
Intensity Amps 0 A
Power Watts 0 W
Resistance Ω Ohms 0 Ω


Details
Voltage
[V]
The measure of the power differental between two points. It is the electromotive force. This is measured in volts [V].
Current Iintensity
[I]
The flow of electric charge across a surface. This is measured in amps [A].
Power
[P]
The rate of energy transfer. This is measured in watts [W].
Resistance
[R]
The rate of energy transfer. This is measured in ohms [Ω].
Formulas
To find Known Formula
Volts Amps [I]
Resistance Ω
V = I x R
Volts Watts [P]
Amps [I]
V = PI
Volts Watts [P]
Resistance Ω
 P x R 
Amps [I]
Volts
Resistance Ω
I = VR
Amps [I]
Watts [P]
Volts
I = P V
Amps [I]
Watts [P]
Resistance Ω
I =  PR 
Watts [P]
Volts
Amps [I]
P = V x I
Watts [P]
Volts
Resistance Ω
P = V2R
Watts [P]
Amps [I]
Resistance Ω
P = I2 x R
Resistance Ω Volts
Amps [I]
R = VI
Resistance Ω Volts
Watts [P]
R = V2P
Resistance Ω Watts [P]
Amps [I]
R = PI2

 


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