Voltage Divider Calculator
Calculate output voltage of a resistive voltage divider given R1, R2, and input voltage. Ideal for sensor circuits and bias networks.
How It Works
Calculate output voltage of a resistive voltage divider given R1, R2, and input voltage. Ideal for sensor circuits and bias networks. Enter your values above and click Calculate to get instant results.
Formula
V_out = V_in × R2 / (R1 + R2)
Quick Examples
- R1=10kΩ, R2=4.7kΩ, Vin=12V → Vout=3.89V
- R1=1kΩ, R2=1kΩ, Vin=5V → Vout=2.5V
Frequently Asked Questions
What is a voltage divider?
A voltage divider uses two resistors in series to produce a fraction of the input voltage at the midpoint. V_out = V_in × R2 / (R1 + R2).
When should I use a voltage divider?
Voltage dividers are used in sensor circuits, ADC reference voltages, and bias networks. Avoid them for powering loads as the output impedance is high.