Voltage Divider Calculator
Find Output Voltage
Vout = Vin × R2 / (R1 + R2)
Find R2 for Desired Vout
R2 = R1 × Vout / (Vin - Vout)
Formula
Vout = Vin × R2 / (R1 + R2)
Frequently Asked Questions
What is a voltage divider?
A voltage divider is a simple circuit using two resistors in series to produce an output voltage that is a fraction of the input voltage. The formula is Vout = Vin × R2 / (R1 + R2).
When should I use a voltage divider?
Voltage dividers are commonly used for sensor readings, biasing transistors, level shifting, and creating reference voltages. They work best with high-impedance loads.
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