Instantly calculate Voltage (V), Current (I), Resistance (R), or Power (P) using fundamental Ohm's Law equations. This essential tool helps electricians and engineers solve circuit parameters without manual math.
The fundamental formula is V = I × R, where V is Voltage, I is Current, and R is Resistance. Variations include I = V/R and R = V/I.
Yes, this calculator works for DC circuits and purely resistive AC circuits. For AC circuits with inductance or capacitance, you should use Impedance (Z) instead of Resistance.
P=VI is the most common power formula.