A voltage divider is a simple circuit that reduces voltage using two resistors. It's commonly used in analog circuits to create reference voltages or to scale down signals for microcontrollers, sensors, or audio inputs.

The output voltage is calculated as: \[ V_\text{out} = V_\text{in} \times \frac{R_2}{R_1 + R_2} \]

Where:

• V_in is the input voltage
• R1 is connected to the input
• R2 is connected between R1 and ground
• V_out is taken from between R1 and R2

This calculator lets you quickly determine V_out given V_in, R1, and R2.