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Electrical Engineering
Ohm's Law Calculator
Enter any two values — voltage (V), current (I), or resistance (R) — and instantly solve for all four: V, I, R, and power (P).
V
A
Ω
Enter any two values above to calculate the remaining variables.
Formulas
V = I × R
I = V / R
R = V / I
P = V × I
P = I² × R
P = V² / R