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


⬇️ Inputs



⬆️ Outputs


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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.


Voltage, Current and Resistance examples:

👉 Important information

Additional Resources

To calculate the power dissipated in a circuit, the battery capacity or the full load current in a system, check out our other calculators!
  1. 🔗 Full Load Current
  1. 🔗 Battery Capacity
  1. 🔗 Power (DC circuits)

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