Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law.

Enter any two values to calculate the other two

VVoltage (V) — Volts(V)

ICurrent (I) — Amperes(A)

RResistance (R) — Ohms (Ω)(Ω)

PPower (P) — Watts(W)

V = I × R

P = V × I

P = I² × R

P = V² / R

I = V / R = √(P / R)

R = V / I = V² / P

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