AC Ohm's law calculator Impedance: Z = Ω kΩ MΩ ∠ ° = Current: I = μA mA A kA MA ∠ ° Voltage: V = V kV MV ∠ ° Power: S = VA kVA MVA ∠ ° = AC Ohm's law formula V(V) = I(A) × Z(Ω) = (|I|×|Z|) ∠ (θI + θZ) S(VA) = V(V) × I(A) = (|V|×|I|) ∠ (θV - θI)