Physics & Engineering / Electricity & Magnetism

Ohm's Law Calculator

Enter any 2 values to calculate the others

Voltage (V)

Current (I) - Amperes

Resistance (R) - Ohms

Power (P) - Watts

V = I × R (Voltage = Current × Resistance)

I = V / R (Current = Voltage / Resistance)

R = V / I (Resistance = Voltage / Current)

P = V × I = I² × R = V² / R (Power)

See Also