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Use our easy resistor color code calculator to read 3-band, 4-band, 5-band, and 6-band resistors. Clear steps, fast results, and simple color code formulas.
Resistor color codes can look hard at first. But they don’t need to be. Our resistor color code calculator makes the job fast and clear. You’ll pick a few color bands and get the right value at once. It works for 3-band, 4-band, 5-band, and 6-band resistors. You don’t need deep math. You don’t need long notes. You just pick colors and see the value.
This guide helps you learn how it works. You’ll also see the math behind it. Let’s keep things simple and real.
Each band tells a part of the value. The first bands show the digits. The next band sets the multiplier. The last band shows the tolerance. In 6-band resistors, the last band also shows the TCR.
The idea sounds tough. But it’s really not. Think of it like a short code. Each color holds a small clue.
Here’s the math in plain words:
For 3-band and 4-band resistors:
Value = (10 × first digit + second digit) × multiplier
For 5-band and 6-band resistors:
Value = (100 × first digit + 10 × second digit + third digit) × multiplier
Tolerance shows the high and low range:
Min value = Value × (1 − tolerance%)
Max value = Value × (1 + tolerance%)
This is what our calculator uses to get the exact value.
3-Band Resistor Color Code
These use two digits and one multiplier. They have a set 20% tolerance. They’re simple and common.
4-Band Resistor Color Code
These use two digits, one multiplier, and one tolerance band. They’re the most used type today.
5-Band Resistor Color Code
These use three digits, one multiplier, and one tolerance band. They give more exact values.
6-Band Resistor Color Code
These add a TCR band. It helps show how the value shifts with heat. These are used in high-grade parts.
Using the tool is easy. Pick the right band type first. Then choose each color band. The app shows the ohm value in real time. You also see the min and max range. You don’t need to know complex terms. Just match the color on the part to the color option in the tool.
Say you pick brown, black, red, and gold. The app shows 1,000 ohms with a 5% range. It’s that quick. It’s like reading a color puzzle with a smart helper by your side.
It saves time. It cuts errors. It works for all band types. It’s easy to use even if you’re new to electronics. You don’t need to check a chart. You don’t need to guess the color order. You can check any resistor in seconds.
The tool is built with care. It uses the right math. It uses the right values for each color. You can trust the results every time.
Let’s take a 5-band code: brown, black, black, red, brown.
Digits: 1, 0, 0
Multiplier: 100
Tolerance: 1%
Value = 100 × 100 = 10,000 ohms
Range: 9,900 to 10,100 ohms
This shows how fast the math works. And the app does it for you.
This resistor color code calculator is a fast and clear way to read resistor values. It cuts out stress and guesswork. It helps new users and skilled users too. You’ll get full results in a few taps. If you deal with color bands, this tool saves you time every day.
It’s a color band system that shows the resistor value. Each color links to a number.
Resistors are small, so colors make the value easy to read.
It shows more data, like TCR, for heat-stable parts.
Yes. It’s simple and clear. You just pick colors.
It works for 3-band, 4-band, 5-band, and 6-band resistors.