Potential Divider Calculator

This calculator performs calculations for potential divider circuits, as well as giving you information about the power and current that your potential divider will draw, and the ratio for use in your code if you are using this for working out the voltage via an ADC on a microcontroller.

It will also give you suggestions on E24 series resistors to aim for, so you can dial in on values that are commonly available.

A voltage divider circuit is a very common circuit that takes a higher voltage and converts it to a lower one by using a pair of resistors. The formula for calculating the output voltage is based on Ohm’s Law, and is Vout = (Vin * R2) / (R1 + R2)