๐จ Ever wondered what those colorful stripes on resistors mean?
Each color represents a number, and together they tell you the resistance value!
Our Resistor Color Code Calculator helps you instantly decode 4-band resistors without memorizing color charts.
Letโs make it simple!
Table of Contents
๐งฎ How to Use the Resistor Color Code Calculator
Itโs easy:
Select the Color of the First Band
- This represents the first digit.
Select the Color of the Second Band
- This represents the second digit.
Select the Color of the Multiplier Band
- This tells you how many zeros (or decimal points) to add.
Click Calculate and see the resistance value in ohms (ฮฉ)!
Resistor Color Code Calculator
๐ Example
Suppose your resistor has these colors:
- Red โ 2
- Violet โ 7
- Orange โ ร1,000
The calculation is:
(2 ร 10 + 7) ร 1,000 = 27,000 ฮฉ or 27 kฮฉ
๐ Your resistor is 27 kฮฉ!

๐ What Is a Resistor Color Code?
Resistors use colored bands to indicate their value.
Typically, a 4-band resistor has:
- First Band โ 1st digit
- Second Band โ 2nd digit
- Third Band โ Multiplier (how many zeros)
- Fourth Band (optional) โ Tolerance (accuracy)
For now, weโll focus on finding the main resistance value!
๐ฏ Why Use a Resistor Color Code Calculator?
Hereโs why engineers, students, and DIYers love it:
- โ Instantly find resistor values without a color chart
- โ Avoid manual calculation errors
- โ Speed up circuit building and repairs
- โ Great for electronics hobbyists and learners
Instead of second-guessing color meanings, just select colors and get your answer!
โจ Bonus Tip
If you ever mix up a resistor color or can’t tell shades apart (brown vs. red or orange vs. yellow), always double-check with a multimeter too! ๐โก