Ohm's Law Calculator
Calculate voltage, current, resistance, and power instantly. Enter any two values — the third is solved automatically.
Enter any two of Voltage (V), Current (I), or Resistance (R) to calculate all four electrical quantities.
Formula used
R = V / I
Voltage (V): 12 V
Current (I): 2 A
Resistance (R): 6 Ω
Power (P): 24 W
Key formulas: V = I × R | P = V × I = I²R = V²/R
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