Voltage Divider

Calculate the unloaded output of a two-resistor voltage divider.

How this calculator works

Enter the values for first value, second value and review the units before calculating.

Formula / method

Vout = Vin × R2 ÷ (R1 + R2)

Worked example

12 V with equal 10 kΩ resistors gives 6 V unloaded output.

Assumptions and limitations

The output load is negligible compared with the divider resistance.

A connected load changes the result; use a loaded-divider analysis for real circuits.