Voltage Divider Calculator
Calculate output voltage, quiescent current, and power dissipation of voltage dividers or automatically find the best E12/E24/E96 resistor pairs for your target voltage.
Input Parameters
Calculated Results
Formula & Circuit
Vout = Vin × ( R2 / (R1 + R2) )How does this tool work?
Interactive voltage divider calculator with circuit diagram preview, load resistance compensation, and standard E-series resistor pair finder.
Calculates unloaded and loaded voltage dividers (Vout = Vin * (R2 || RL) / (R1 + (R2 || RL))), current draw, and power dissipation. The target voltage mode scans E12, E24, and E96 series for optimal resistor pairs with lowest voltage error.
Where are my data processed?
Only in your browser. Your data is not sent to any server.
The tool calculates and converts with JavaScript right on your device. Input and files are not sent to us or anyone else. You can check this yourself: load the page, disconnect from the internet, and the tool keeps working in the open tab.