Voltage divider calculator
In order to understand how to calculate voltage divider formula, consider the circuit shown above. Resistors R1 and R2 are connected in series, hence the current flowing through both the resistors would be same. The current flowing through the circuit can be calculated by using the relation I= V/ (R1 + R2).
Now we can calculate the voltage drop across resistor by using Ohm's law as follows.
Voltage drop across resistor R1 will be V1 = (R1 * V) / (R1 + R2).
Voltage drop across resistor R2 will be V1 = (R2 * V) / (R1 + R2).