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?
100% Client-Side: Your data never leaves your browser.
All calculations, conversions, encodings, and file processing of this tool are executed exclusively locally via JavaScript on your client device. No inputs, passwords, cryptographic keys, texts, or uploaded files are ever sent to our servers or third parties. Once the page is loaded, the tool remains completely functional even offline.