Voltage Calculator

Calculate voltage from current and resistance or power and current.

EngineeringFree
Formula
V = I × R or V = P / I
Example

I=3A, R=4Ω → V=12V.

Frequently Asked Questions

Related Calculators

Ohms Law Calculator
Calculate voltage, current, resistance, and power using Ohm's Law.
Current Calculator
Calculate electric current from voltage and resistance.
Resistance Calculator
Calculate electrical resistance from voltage and current.