Voltage Divider Calculator

Enter any three of the following values and then click calculate button.

Vin = Input Voltage
Vout = Output Voltage

Vin: Volts
Ra: Ohms
Rb: Ohms
Vout: Volts


A voltage divider (also known as a potential divider) consists of two resistances Ra and Rb connected in series across a supply voltage Vin. The supply voltage is divided between the two resistances to give an output voltage Vout which is the voltage across Rb.

This configuration is known as a voltage divider because it divides the input voltage into two parts.