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Voltage Divider Calculator

How to design a voltage divider

  1. Choose whether to find the output voltage or the R2 value for a target output.
  2. Enter the input voltage and R1.
  3. Enter R2 or the target output voltage.

Frequently asked questions

What is the formula?

Vout = Vin × R2 / (R1 + R2). It holds when the load connected to the output draws much less current than the divider itself.

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