Voltage Divider Calculator illustration

Voltage Divider Calculator

Computes the output of a two-resistor voltage divider, or solves for the R2 that produces a target output voltage, with divider current and power in each resistor.

Notes

  • Vout = Vin · R2 / (R1 + R2). The formula holds only while the load draws much less current than flows through the divider itself.

Explore the idea

This interactive demo needs JavaScript.