\[V_{out}=V_{in}\frac{R_2}{R_1+R_2}\]
Variables
Voutoutput voltage (V)
Vininput voltage (V)
R1upper resistance (ohm)
R2lower resistance (ohm)
Description
What is this formula?
This formula calculates the output voltage of a two-resistor voltage divider circuit.
When to use it
Use it when reducing or scaling voltage levels in electrical and electronic circuits.
Example
Data:
Vin = 12 V
R1 = 4 ohm
R2 = 2 ohm
Formula:
Vout = Vin*(R2/(R1+R2))
Substitution:
Vout = 12*(2/(4+2))
Result:
Vout = 4 V
Applications
Electronics, sensor circuits, analog systems, signal conditioning, voltage reference design, and electrical engineering.