Ohm's Law & Watt's Law Calculator
Measured in Volts, is represented by the letter V (or E)
Measured in Amperes, is represented with the letter I
Measured in Ohms, is represented by the letter R (or the Greek letter Ω)
Measured in watts, is represented by the letter W
States the relationship between voltage, current and resistance. Given the relationship between these three elements, once you know any two of them, it is possible to calculate the third.
V = IR
Volts = Amps x Ohms
I = V/R
Amps = Volts / Ohms
R = V/I
Ohms = Volts / Amps
Watt's Law is similarly useful in figuring out the relationship between power, voltage and current.
W = VI
Watts = Volts x Amps
V = W/I
Volts = Watts / Amps
A = W/V
Amps = Watts / Volts
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