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Voltage divider

Find the output voltage of an unloaded two-resistor divider.

Unloaded ideal resistor divider. Loading and source impedance are not modelled.

Input voltage applied to the top of R1.

Top resistor connected between Vin and the output node.

Bottom resistor connected between the output node and GND.

Results

Enter Vin, R1, and R2, then calculate.

How this works

Unloaded divider. Loading draws current from the node and lowers Vout – size R1/R2 for your input bias current or buffer if needed.

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Check the stated method and limits against your installation. Results are calculation aids, not certification.

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Calculation model 2026-11-02.1