Voltage Divider Calculator
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 shown below.
Circuit simulator
Vout =
Vs × R2
(R1 + R2)
where:
- Vs is the source voltage, measured in volts (V).
- R1 is the resistance of the 1st resistor, measured in Ohms (Ω).
- R2 is the resistance of the 2nd resistor, measured in Ohms (Ω).
- Vout is the output voltage, measured in volts (V).
Enter any three known values. The fourth will be calculated automatically.
Volts (V)
Volts (V)
The field with an orange border is auto-calculated.