About this tool
Enter the input voltage and the two resistor values to find the divider's output voltage and the current flowing through it, using Vout = Vin × R2 / (R1 + R2). The calculation runs live in your browser.
Frequently asked questions
Which resistor sets the output?
The output is taken across R2, so Vout = Vin × R2 / (R1 + R2). Swapping the resistors changes the ratio.
How is the current found?
The current through the divider equals Vin divided by the total resistance (R1 + R2), shown in both milliamps and amps.