Voltage Divider Calculator
Calculate the output voltage of a voltage divider circuit.
Calculator Inputs
Results
Output Voltage (Vout)
2.5 V
Vout = Vin * (R2 / (R1 + R2))
Understanding the Voltage Divider
This calculator determines the output voltage from a resistor voltage divider. As shown in the diagram, R1 is the resistor closer to the input voltage (Vin) and R2 is the resistor closer to ground. The output voltage (Vout) is taken from the point between the two resistors.
Frequently Asked Questions
What is a voltage divider?
A voltage divider is a simple circuit that turns a large voltage into a smaller one. Using just two resistors in series, it creates an output voltage that is a fraction of the input voltage.
What is the formula for a voltage divider?
The formula is Vout = Vin × (R2 / (R1 + R2)), where Vin is the input voltage, R1 is the resistor connected to the input, and R2 is the resistor connected to ground.
What are common uses for voltage dividers?
They are commonly used to create reference voltages, read sensors (like photoresistors), and adjust signal levels between different parts of a circuit.