Series Resistor Calculator

What Is a Series Resistor?

When two or more resistors are connected in series, they are connected one after another in a single path for current. The same current flows through every resistor.

The total resistance is calculated by adding the resistance of each resistor:

Rₜ = R₁ + R₂ + R₃ + … + Rₙ

For example, if a circuit contains three resistors:

• R₁ = 100 Ω
• R₂ = 220 Ω
• R₃ = 330 Ω

Then:

Rₜ = 100 + 220 + 330 = 650 Ω

How to Use the Series Resistor Calculator

1. Enter the resistance value for the first resistor.
2. Select the appropriate unit: Ω, kΩ, or MΩ.
3. Add additional resistors as needed.
4. Enter the value of each resistor.
5. The calculator automatically calculates the total resistance.

Series Resistor Formula

The formula for calculating the total resistance of resistors connected in series is:

Rₜ = R₁ + R₂ + R₃ + … + Rₙ

Where:

• Rₜ = Total resistance
• R₁, R₂, R₃… = Individual resistor values
• n = Number of resistors

Example

Suppose four resistors are connected in series:

• R₁ = 100 Ω
• R₂ = 150 Ω
• R₃ = 220 Ω
• R₄ = 330 Ω

The total resistance is:

Rₜ = 100 + 150 + 220 + 330

Rₜ = 800 Ω

Features

• Calculate total resistance instantly
• Add multiple resistors
• Supports Ω, kΩ, and MΩ
• Automatically updates the result
• Remove individual resistors
• Simple and easy-to-use interface
• Fully responsive on mobile, tablet, and desktop

Applications

A series resistor calculator can be useful for:

• Electronics projects
• Circuit design
• Electrical engineering
• Electronics students
• Resistor network calculations
• Learning electrical circuits
• Checking manual calculations