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Voltage Divider Calculator

Output voltage of a 2-resistor voltage divider.

Compute the output voltage of a two-resistor voltage divider from the input voltage and the two resistor values.

Daniel Oh By Daniel Oh
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

V
Ω
Ω

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

V_out = V_in · R₂ / (R₁ + R₂)

In depth

Compute the output voltage of a two-resistor voltage divider from the input voltage and the two resistor values.