Voltage Divider Calculator

Calculate the output voltage of a voltage divider circuit using two resistors. Enter the input voltage and resistor values to find the divided output voltage.

Voltage Divider Circuit

    Vin ──┬──── R1 ────┬──── GND
          │            │
          │            ├──── Vout
          │            │
          └──── R2 ────┘

About Voltage Dividers

A voltage divider is a passive linear circuit that produces an output voltage that is a fraction of its input voltage. It consists of two resistors in series, where the output voltage is taken from the junction between the two resistors.

The voltage divider formula is: Vout = Vin × (R2 / (R1 + R2))

Applications:

  • Level shifting in analog circuits
  • Biasing transistors and op-amps
  • Creating reference voltages
  • Sensor signal conditioning
  • Potentiometer circuits

Important Notes:

  • The output voltage is always less than the input voltage
  • Loading effects can change the output voltage
  • Higher resistance values reduce current consumption
  • Consider power ratings of resistors