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Voltage Divider Calculator

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.

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.

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 Z₁, Z₂ 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:

V₂ = Z₂ / (Z₁ + Z₂) * V₁

  • The formula for RR divider type is V₂ = R₂ / (R₁ + R₂) * V₁
  • The CC divider type formula is V₂ = C₂ / (C₁ + C₂) * V₁
  • The inductive divider equation is V₂ = L₂ / (L₁ + L₂) * V₁
  • For RC Filter, The voltage divider formula is |V₂| = |V₁ / (jωRC + 1)| = |V₁| / √((ωRC)² + 1)
  • The voltage divider for CR circuit is |V₂| = |jωRC / (jωRC + 1) * V₁| = ωRC / √((ωRC)² + 1) * |V₁|
  • For RL circuit, |V₂| = |jωL / (R + jωL) * V₁| = ωL / √(R² + (ωL)²) * |V₁|
  • For LR circuit, |V₂| = |R / (R + jωL) * V₁| = R / √(R² + (ωL)²) * |V₁|

Here, V₁, V₂ are the amplitudes of the signals.

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


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.


Given that

Resistances R₁ = 18 Ω, R₂ = 24 Ω

Input voltage V₁ = 14 V

Voltage diver formula for output voltage is V₂ = R₂ / (R₁ + R₂) * V₁

V₂ = 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 V₂ = R₂/(R₁ + R₂) x V₁. Here, V₁, V₂ are the input and output voltage and R₁, R₂ is the resistances of two resistors.

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