Voltage Divider Calculator

Calculate voltage division with our precise and accessible voltage divider calculator. Ideal for electronics engineers and hobbyists.

Full original guide (expanded)

Voltage Divider Calculator

Compute output voltage from two resistors, plus load effects, to design quick divider networks.

Voltage Divider Inputs

Results

Output Voltage (V) 0.00

Authoritative Data Source and Methodology

All calculations are based on the standard voltage divider formula used in circuit analysis, as detailed in the following source: Wikipedia - Voltage Divider. All calculations strictly adhere to the formulas and data provided by this source.

The Formula Explained

\( V_{\text{out}} = V_{\text{in}} \times \frac{R2}{R1 + R2} \)

Glossary of Variables

  • Input Voltage (V): The voltage supplied to the circuit.
  • Resistor 1 (Ω): The resistance value of the first resistor.
  • Resistor 2 (Ω): The resistance value of the second resistor.
  • Output Voltage (V): The voltage obtained across the second resistor.

How It Works: A Step-by-Step Example

Suppose you have an input voltage of 9V and you want a 3V output. If R1 is 2kΩ and R2 is 1kΩ, then according to the formula, the output voltage will be:

\( V_{\text{out}} = 9 \times \frac{1}{2 + 1} = 3V \)

Frequently Asked Questions (FAQ)

What is a voltage divider?

A voltage divider is a simple circuit that turns a large voltage into a smaller one using two series resistors.

How do I use the voltage divider calculator?

Enter the input voltage and the values for the resistors to compute the output voltage.

What are practical applications of a voltage divider?

They are used in adjusting signal levels, biasing active devices in amplifiers, and measuring voltages.

Can I use a voltage divider for high power applications?

Voltage dividers are not ideal for high power applications as they can dissipate a lot of heat.

How accurate is the voltage divider calculator?

The calculator is accurate as long as the resistor values are precise and the load is negligible.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
\( V_{\text{out}} = V_{\text{in}} \times \frac{R2}{R1 + R2} \)
Formula (extracted text)
\( V_{\text{out}} = 9 \times \frac{1}{2 + 1} = 3V \)
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

Voltage Divider Calculator

Compute output voltage from two resistors, plus load effects, to design quick divider networks.

Voltage Divider Inputs

Results

Output Voltage (V) 0.00

Authoritative Data Source and Methodology

All calculations are based on the standard voltage divider formula used in circuit analysis, as detailed in the following source: Wikipedia - Voltage Divider. All calculations strictly adhere to the formulas and data provided by this source.

The Formula Explained

\( V_{\text{out}} = V_{\text{in}} \times \frac{R2}{R1 + R2} \)

Glossary of Variables

  • Input Voltage (V): The voltage supplied to the circuit.
  • Resistor 1 (Ω): The resistance value of the first resistor.
  • Resistor 2 (Ω): The resistance value of the second resistor.
  • Output Voltage (V): The voltage obtained across the second resistor.

How It Works: A Step-by-Step Example

Suppose you have an input voltage of 9V and you want a 3V output. If R1 is 2kΩ and R2 is 1kΩ, then according to the formula, the output voltage will be:

\( V_{\text{out}} = 9 \times \frac{1}{2 + 1} = 3V \)

Frequently Asked Questions (FAQ)

What is a voltage divider?

A voltage divider is a simple circuit that turns a large voltage into a smaller one using two series resistors.

How do I use the voltage divider calculator?

Enter the input voltage and the values for the resistors to compute the output voltage.

What are practical applications of a voltage divider?

They are used in adjusting signal levels, biasing active devices in amplifiers, and measuring voltages.

Can I use a voltage divider for high power applications?

Voltage dividers are not ideal for high power applications as they can dissipate a lot of heat.

How accurate is the voltage divider calculator?

The calculator is accurate as long as the resistor values are precise and the load is negligible.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
\( V_{\text{out}} = V_{\text{in}} \times \frac{R2}{R1 + R2} \)
Formula (extracted text)
\( V_{\text{out}} = 9 \times \frac{1}{2 + 1} = 3V \)
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

Voltage Divider Calculator

Compute output voltage from two resistors, plus load effects, to design quick divider networks.

Voltage Divider Inputs

Results

Output Voltage (V) 0.00

Authoritative Data Source and Methodology

All calculations are based on the standard voltage divider formula used in circuit analysis, as detailed in the following source: Wikipedia - Voltage Divider. All calculations strictly adhere to the formulas and data provided by this source.

The Formula Explained

\( V_{\text{out}} = V_{\text{in}} \times \frac{R2}{R1 + R2} \)

Glossary of Variables

  • Input Voltage (V): The voltage supplied to the circuit.
  • Resistor 1 (Ω): The resistance value of the first resistor.
  • Resistor 2 (Ω): The resistance value of the second resistor.
  • Output Voltage (V): The voltage obtained across the second resistor.

How It Works: A Step-by-Step Example

Suppose you have an input voltage of 9V and you want a 3V output. If R1 is 2kΩ and R2 is 1kΩ, then according to the formula, the output voltage will be:

\( V_{\text{out}} = 9 \times \frac{1}{2 + 1} = 3V \)

Frequently Asked Questions (FAQ)

What is a voltage divider?

A voltage divider is a simple circuit that turns a large voltage into a smaller one using two series resistors.

How do I use the voltage divider calculator?

Enter the input voltage and the values for the resistors to compute the output voltage.

What are practical applications of a voltage divider?

They are used in adjusting signal levels, biasing active devices in amplifiers, and measuring voltages.

Can I use a voltage divider for high power applications?

Voltage dividers are not ideal for high power applications as they can dissipate a lot of heat.

How accurate is the voltage divider calculator?

The calculator is accurate as long as the resistor values are precise and the load is negligible.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
\( V_{\text{out}} = V_{\text{in}} \times \frac{R2}{R1 + R2} \)
Formula (extracted text)
\( V_{\text{out}} = 9 \times \frac{1}{2 + 1} = 3V \)
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
Formulas

(Formulas preserved from original page content, if present.)

Citations

(Citations preserved from original page content, if present.)

Changelog
  • 0.1.0-draft — (auto-wrapped): Canonical shell enforced without modifying calculator logic.
Version 0.1.0-draft