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Voltage Divider Calculator

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This online calculator helps to determine  the output voltage of a voltage divider circuit. Simply we can say that this circuit consists of two resistors and an input voltage. These resistors are connected in series. The schematics of the electrical circuit is

The mathematical representation of the output voltage is,

Problems

Let us discuss the problems related to voltage divider.

Solved Examples

Question 1: The value of two resistors which are connected in series are given as 5$\Omega$ and 3$\Omega$ respectively. If the input voltage of the given circuit is given as 15V, calculate the output voltage.

Solution:

Given parameters are,
$R_{a}$ = 5Ω,
$R_{b}$ = 3Ω,
$V_{in}$ = 15V

Output Voltage of the circuit is,

$V_{out}$ = $\frac{R_{b}}{R_{a}+R_{b}}$$\times V_{in} V_{out} = \frac{3}{5 + 3}$$\times$ 15 = 5.625V

Question 2: $R_{a}$ and $R_{b}$ of a voltage divider circuit is given as 2$\Omega$ and 4$\Omega$ respectively. If the input voltage of the given circuit is given as 12V, calculate the output voltage.

Solution:

Given parameters are,
$R_{a}$ = 2Ω,
$R_{b}$ = 4Ω,
$V_{in}$ = 12V

Output Voltage of the circuit is,

$V_{out}$ = $\frac{R_{b}}{R_{a}+R_{b}}$$\times V_{in} V_{out} = \frac{4}{2 + 4}$$\times$ 12 = 8V