## Ohm’s Law calculator

We are offering the Online ohm’s law calculator, to help you calculate the value of voltage / resistance / current or power.

## Ohm’s law calculator

All you need is to enter the 2 values to obtain the other values and then hit the = button to calculate.

## AC Ohm’s law calculator

All you need is to enter the **2 values** of magnitude+phase angle to get the other values and press the

*Calculate*button.

**Tool**

## Ohm’s law formula

The value of voltage V measured in volts (V) is apparently equal to the value of current I in amps (A) multiplied by the resistance R measured in ohms (Ω).

**V _{(V)} = I_{(A)} × R_{(Ω)}**

The power P measured in watts (W) is apparently equal to the value of voltage V in volts (V) multiplied by the current I measured in amps (A).

**P _{(W)} = V_{(V)} × I_{(A)}**

## AC Ohm’s law formula

The voltage V in volts (V) is apparently equal to the value of current I in amps (A) multiplied by the impedance Z in ohms (Ω).

**V _{(V)} = I_{(A)} × Z_{(Ω)} = (|I|×|Z|) ∠ (θ_{I} + θ_{Z})**

The complex power S measured in volt-amps (VA) is apparently equal to the value of voltage V in volts (V) multiplied by the current I measured in amps (A).

**S _{(VA)} = V_{(V)} × I_{(A)} = (|V|×|I|) ∠ (θ_{V} – θ_{I})**