Voltage Divider Calculator

Created By : awnish

Reviewed By : Phani Ponnapalli

Last Updated : Apr 10, 2023

Our free Voltage Divider Calculator determines the output voltage for the given details in a fraction of seconds. All you need to do is fill select the divider type, enter input voltage and other required parameters and press the calculate button to avail the result easily.

Choose divider type
Input voltage(V1):
Resistance 1(R1):
Resistance 2(R2):

Voltage Divider Calculator: Learn the simple steps to find the output voltage in a voltage divider and its formula. Otherwise, make use of our handy Voltage Divider Calculator that generates results along with detailed explanations easily & fastly. Read on to get the voltage divider rule, capacitive and inductive voltage divider equations and applications of a voltage divider in the following sections. Also, check the example questions and solutions on the voltage divider

Voltage Divider Calculator

What is Voltage Divider Rule?

A voltage divider circuit is a simple circuit that takes a higher voltage and converts it into the lower voltage by using a pair of resistors. The ratio of output and input voltage should never be greater than 1. The general voltage divider circuit circuit is presented here.

Voltage Divider

Here ZΓéü, ZΓéé are impedances. The impedances can be resistance R, capacitance C, or inductance L.

The basic types of voltage divides are along the lines:

  • Resistive divider RR
  • Capacitive divider CC
  • Inductive divider LL
  • RC and CR divider (RC, CR filters)
  • RL and LR divider (RL, LR filters)
  • CL and LC divider (CL, LC filters)

Voltage Divider Rule:

Voltage dividers is the current passing through several devices connected in series is constant, but the voltage is divided between them in a circuit. RR divider is applicable to DC circuits. Here, impedance can be treated with zero resistivity and capacitance work as a gap in the circuit.

Voltage Divider Formula

The general voltage divider formula for impedances is given as:

VΓéé = ZΓéé / (ZΓéü + ZΓéé) * VΓéü

  • The formula for RR divider type is VΓéé = RΓéé / (RΓéü + RΓéé) * VΓéü
  • The CC divider type formula is VΓéé = CΓéé / (CΓéü + CΓéé) * VΓéü
  • The inductive divider equation is VΓéé = LΓéé / (LΓéü + LΓéé) * VΓéü
  • For RC Filter, The voltage divider formula is |VΓéé| = |VΓéü / (jωRC + 1)| = |VΓéü| / √((ωRC)² + 1)
  • The voltage divider for CR circuit is |VΓéé| = |jωRC / (jωRC + 1) * VΓéü| = ωRC / √((ωRC)² + 1) * |VΓéü|
  • For RL circuit, |VΓéé| = |jωL / (R + jωL) * VΓéü| = ωL / √(R² + (ωL)²) * |VΓéü|
  • For LR circuit, |VΓéé| = |R / (R + jωL) * VΓéü| = R / √(R² + (ωL)²) * |VΓéü|

Here, VΓéü, VΓéé are the amplitudes of the signals.

The voltage divider can be used in potentiometers, level shifters, resistive sensor reading and many more.

Example

Question: Determine the output voltage of the voltage divider circuit whose resistances are 18 Ω and 24 Ω and the input voltage is 14 v.

Solution:

Given that

Resistances RΓéü = 18 Ω, RΓéé = 24 Ω

Input voltage VΓéü = 14 V

Voltage diver formula for output voltage is VΓéé = RΓéé / (RΓéü + RΓéé) * VΓéü

VΓéé = 24 / (24 + 18) * 14

= 8

Therefore, the output voltage is 8 v.

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Frequently Asked Questions on Voltage Divider Calculator

1. What are the advantages of voltage divider?

The voltage divider is the ideal biasing technique. So, it is used to bias a transistor. It can incorporate more than one kind of voltage divider.

2. What is meant by voltage divider?

The voltage divider is a fundamental electric circuit that can generate the output voltage for the given input voltage. It is also called as the potential divider.

3. What is the voltage divider rule?

The current passing through different elements in the circuit is constant but the voltage is divided between them. The exact value of voltage in each element can be calculated using this rule. It is used to solve simple circuits.

4. What is the voltage divider formula?

The formula to find the output voltage when two resistors are connected in series is VΓéé = RΓéé/(RΓéü + RΓéé) x VΓéü. Here, VΓéü, VΓéé are the input and output voltage and RΓéü, RΓéé is the resistances of two resistors.