A voltage divider circuit is a very common circuit that takes a higher voltage and converts it to a lower one by using a pair of resistors. The formula for calculating the output voltage is based on Ohms Law and is shown below.

where:

- V
_{S}is the source voltage, measured in volts (V), - R
_{1}is the resistance of the 1st resistor, measured in Ohms (Ω). - R
_{2}is the resistance of the 2nd resistor, measured in Ohms (Ω). - V
_{out}is the output voltage, measured in volts (V),

Enter any three known values and press "Calculate" to solve for the other.