Voltage Divider Calculator
Calculate output voltage for resistor dividers
Formula
Vout = Vin × R2 / (R1 + R2)I = Vin / (R1 + R2)
A voltage divider uses two resistors in series to reduce voltage. The output voltage is calculated as: Vout = Vin × R2 / (R1 + R2). This circuit is commonly used for sensor interfaces, reference voltages, and signal level adjustment.
Example: With Vin = 12V, R1 = 10kΩ, and R2 = 5kΩ, the output voltage would be 4V (12V × 5kΩ / 15kΩ).