Ohm's Law Calculator

Calculate voltage, current, resistance, power from any two inputs. Visual triangle diagram. Common formulas reference.

Enter any two values to calculate the other two.

Voltage (V)

Current (I)

Resistance (R)

Power (P)

V = I x R

Voltage

I = V / R

Current

R = V / I

Resistance

P = V x I

Power

P = I\u00B2 x R

Power

P = V\u00B2 / R

Power

I = P / V

Current

R = V\u00B2 / P

Resistance

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