## Voltage Divider Calculator

We are offering the voltage divider calculator, which will help you to calculate the voltage drops on every resistor load, when it is connected in the series. All you need is to enter the total value of voltage supply and hit the = button.

## Voltage divider rule

The rule to find the value for a DC circuit with the constant voltage source V_{T} and the value of resistors in series, the value of voltage drop V_{i} measured in resistor R_{i} can be given as,

## Voltage Divider

We are offering the voltage divider rule to help you find out the value of voltage over a load in an electrical circuit, when a number of loads are connected in a series.

- Voltage divider rule for DC circuit
- Voltage divider rule for AC circuit
- Voltage divider calculator

## Voltage divider rule for DC circuit

For a DC circuit with constant voltage source V_{T} and resistors in series, the voltage drop V_{i} in resistor R_{i} is given by the formula:

where the units represents the following,

*V*_{i} – voltage drop in resistor R_{i} in volts [V].

*R*_{i} – resistance of resistor *R*_{i} in ohms [Ω].

*R*_{2} – resistance of resistor *R*_{2} in ohms [Ω].

*V _{T}* – the equivalent voltage source or voltage drop in volts [V].

*R*_{1} – resistance of resistor *R*_{1} in ohms [Ω].

*R*_{3} – resistance of resistor *R*_{3} in ohms [Ω].

#### For Example,

The value of Voltage source of V_{T}=20V, when it is connected to resistors in series, R_{1}=20Ω, R_{2}=40Ω.

Hence, find the measure of voltage drop on resistor R_{2}.

*V*_{2} = *V*_{T} × *R*_{2 }/ (*R*_{1}+*R*_{2}) = 20V × 40Ω / (20Ω+40Ω) = 13.333333333333334 V

## Voltage divider for AC circuit

For an AC circuit with the value voltage source V_{T} and with loads in series, the value of voltage drop V_{i} in load Z_{i} can be calculated with the formula,

Where, the values are,

*V*_{i} – voltage drop in load Z_{i} in volts [V].

*Z*_{i} – impedance of load *Z*_{i} in ohms [Ω].

*Z*_{1} – impedance of load *Z*_{1} in ohms [Ω].

*V _{T}* – the equivalent voltage source or voltage drop in volts [V].

*Z*_{3} – impedance of load *Z*_{3} in ohms [Ω].

*Z*_{2} – impedance of load *Z*_{2} in ohms [Ω].

Check the calculations right away!