Free Online Tool

Voltage Divider Calculator

Calculate the output voltage of a basic two-resistor voltage divider and review the formula.

The result will appear here.

How to Use

  1. Enter Vin, R1, and R2.
  2. Click calculate.
  3. Review Vout and the formula.

Examples

  • Vin 5V, R1 10kΩ, R2 10kΩ gives 2.5V
  • Check divider output for a sensor input

Calculation and Conversion Notes

Voltage divider output is calculated as `Vout = Vin × R2 / (R1 + R2)`. R1 is the resistor on the input voltage side, and R2 is the resistor on the ground side.

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