# Ohm's Law Calculator and how to use

Enter 2 values to get the other values and press the Calculate button:

 Resistance (R): ohms (Ω) kiloohms (kΩ) megaohms (MΩ) Current (I): microamps (μA) milliamps (mA) amps (A) kiloamps (kA) megaamps (MA) Voltage (V): microvolts (μV) millivolts (mV) volts (V) kilovolts (kV) megavolts (MV) Power (P): microwatts (μW) milliwatts (mW) watts (W) kilowatts (kW) megawatts (MW)

## AC Ohm's law conversion calculator

Enter 2 values of magnitude+phase angle to get the other values and press the Calculate button:

 Impedance (Z): Ω kΩ MΩ ∠ ° = Current (I): μA mA A kA MA ∠ ° Voltage (V): V kV MV ∠ ° Power (S): VA kVA MVA ∠ ° =

## Ohm's law formula and how to use

The voltage V in volts (V) is equal to the current I in amps (A) times the resistance R in ohms (Ω):

V(V) = I(A) × R(Ω)

The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A):

P(W) = V(V) × I(A)

## AC Ohm's law formula

The voltage V in volts (V) is eqaul to the current I in amps (A) times the impedance Z in ohms (Ω):

V(V) = I(A) × Z(Ω) = (|I|×|Z|) ∠ (θI + θZ)

The complex power S in volt-amps (VA) is equal to the voltage V in volts (V) times the current I in amps (A):

S(VA) = V(V) × I(A) = (|V|×|I|) ∠ (θV - θI)