Welcome! This page will use Ohm's Law to calculate voltage in a circuit given current and resistance.

It can be used to find component-specific voltages or total voltage in a circuit assuming a DC source.

Ohm's law is the foundation of electrical analysis and, thus, incredibly useful for circuit design.

Let's begin!

Simple DC circuit

Current

:10ampere

Resistance

:5ohms

Voltage

:50volts

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Ohm's law describes the relationship between voltage, current and resistance. A larger current and resistance give rise to a larger voltage. However, a larger resistance reduces the total current if the voltage is constant.

Where:

To calculate the power dissipated in a circuit, the battery capacity or the full load current in a system, check out our other calculators!

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