Ohm's Law Calculator

What is Ohm's Law?

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points. The formula is:

$$ V = I \times R $$

Where:

• V is Voltage in Volts (V)
• I is Current in Amperes (A)
• R is Resistance in Ohms (Ω)

Power Formula

Electric power is the rate at which electrical energy is transferred by an electric circuit.

$$ P = V \times I $$

Where:

• P is Power in Watts (W)

Formulas Rearranged:

• Find Voltage: $V = I \times R$ OR $V = P / I$
• Find Current: $I = V / R$ OR $I = P / V$
• Find Resistance: $R = V / I$ OR $R = V^2 / P$
• Find Power: $P = V \times I$ OR $P = I^2 \times R$