Voltage Divider Calculator
Use our Voltage Divider Calculator to quickly determine the output voltage of a divider network. Simply enter the input voltage and resistor values, and the tool will calculate the missing value, whether you need Vout, Vin, R1, or R2. Ideal for electronics design, sensor interfacing, level shifting, and educational applications.
How a Voltage Divider Works
A voltage divider uses two resistors in series to produce a fraction of the input voltage. The output is taken across the second resistor and follows the classic formula: Vout = Vin × (R2 / (R1 + R2)) This configuration is widely used for signal conditioning, biasing circuits, and voltage scaling. Our calculator automatically computes the unknown variable so you can design circuits faster and more accurately.
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Voltage divider calculator
(Leave one field empty to compute it's value)
R2(Ω)
R1(Ω)
Vin
Vout
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