VOLTAGE DIVIDER

The two resistor voltage divider is one of the most basic and common circuits in electronics. It is often the first circuit a beginner learns. A voltage divider turns a large voltage into a smaller one. How it works is, the ratio of the resistors (R1 and R2) divides the input voltage down to a lower output voltage. The output voltage is a fraction of the input voltage, and that fraction is R2 divided by the sum of R1 + R2. The formula is VOUT = VIN * (R2 / (R1 + R2)). The voltage divider calculator assumes that you know any three values of the voltage divider circuit. Use the calculator below to compute the value of the missing parameter... Voltage Divider Calculator - Calculate the Resistor Values in the Two Resistor Voltage Divider Circuit.