A Voltage Divider Circuit is commonly used circuit in electronics where an input voltage has to be converted to another voltage lower than then the original.  

A voltage divider circuit is very simple circuit built by only two resistors (R1 and R2) as shown above in the circuit diagrams. The required output voltage (VOUT) can be obtained across the resistor R2.  Using these two resistors we can convert an input voltage to any required output voltage.


The output voltage is calculated as per the below equation:

VOUT = (VIN * R2) / (R1 + R2)


You can calculate the output voltage according to resistor values, using this voltage divider calculator