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Ohm's Law & Calculator

Ohm's Law relates the three fundamental electrical quantities: voltage, current and resistance. Power relationships are also given.

Click here for a much more extensive treatment of Ohm's Law.

Ohm's Law triangle

 V = I · R    I = V
         R
   R = V
          I
 P = I · V  P = I2 R   P = V2
        R

I = Current (A)
P = Power (W)
R = Resistance (Ω)
V = Voltage (V)


Ohm's Law Calculator
Please click the Calculate Button for results
 
I= A V =  V
R= P =  W
 
V= V I =  A
R= P =  W
 
V= V R =  Ω
I= A P = W