Voltage Divider Calculator – A Must-Have Tool for Electrical Engineers

What is a Voltage Divider?

A voltage divider is a simple circuit used to reduce voltage using two resistors connected in series. It’s widely used in analog electronics to create reference voltages or to scale down sensor signals before feeding them into ADCs (Analog-to-Digital Converters).

The output voltage

$V_{\text{out}}$

Vout​ is given by:

$$V_{out} = V_{in} \times \frac{R_2}{R_1 + R_2}$$

Vout​=Vin​×R1​+R2​R2​​

Where:

• $V_{in}$

  Vin​ is the input voltage

• $R_1$

  R1​ and

  $R_2$

  R2​ are the two resistors

• $V_{out}$

  Vout​ is the output voltage taken across

  $R_2$

  R2​