Ohm's Law Calculator

Solve for Voltage (E), Current (I), Resistance (R), or Power (P) based on two known electrical variables.

What do you want to solve for?

Voltage (V)

Current (Amps)

Resistance (Ohms)

Pro Tip: Three-Phase Power

These straightforward Ohm's Law formulas apply to DC and Single-Phase AC systems at unity power factor. For 3-Phase systems, you must include the square root of 3 (1.732) and the Power Factor.

Calculation Result

0Watts (P)

0Ohms (R)

120Volts (V)

15Amps (I)

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