# 4-Band Resistor Color Code to Value Calculator

Here, using this 4-Band Resistor Color Code to Value Calculator, you can calculate the value of a Resistor that have four bands or four color coding. You can calculate the value in Ohm, KiloOhms, MegaOhms, and even in GigaOhms also.

## 4-Band Color Code Resistor Value Calculator

## Resistance Value:

## Tolerance:

### How to Use This Calculator?

To use this Calculator, follow the below steps:

- First of all, Identify the four color bands or colors on your resistor.
- For each band, select the corresponding color from the drop-down menu.
**Band 1:**Choose the color of the first color from the "Band 1" drop-down menu.**Band 2:**Choose the color of the second color from the "Band 2" drop-down menu.**Band 3:**Choose the color of the third color from the "Band 3" drop-down menu.**Band 4 (Tolerance):**Choose the color of the fourth band, which represents the tolerance value, from the "Band 4 (Tolerance)" drop-down menu.- Once you have selected the colors for all four bands, click on the "Calculate" button.
- The calculator will process your input and display the calculated resistance value and tolerance.
- Look for the "Resistance Value" section below the calculator interface.
- The calculated resistance value will be shown in the resistance value section.
- Similarly, the "Tolerance" section will display the tolerance value of the resistor.

### Formula

Here are the formulas the calculator uses,

Resistance = (Band1Value * 100 + Band2Value * 10 + Band3Value) * 10^Band4Value

Here's an explanation of each component of the formula:

**Band1Value:**This represents the value of the first color or band of the resistor. Each color corresponds to a specific numerical value (0 to 9). For example, Black = 0, Brown = 1, etc.

**Band2Value:**This represents the value of the second color band. Like Band1Value, each color corresponds to a specific numerical value (0 to 9).

**Band3Value:**This represents the value of the third color band. Each color corresponds to a specific numerical value (0 to 9).

**Band4Value:**This represents the multiplier or tolerance value indicated by the fourth color in the resistor. It determines the order of magnitude for the resistance value or specifies the tolerance range.

The number 10 is the base value used to calculate the resistance. Each digit in the first, second, and third bands represents a factor of 10.

**10^Band4Value:**This is the multiplier applied to the combined value of Band1Value, Band2Value, and Band3Value, determined by the color of the fourth band. It represents the order of magnitude by which the resistance should be multiplied.

### Example

Now, let's take an example to calculate the resistance value of a four-band resistor using the color code.

Assume we have a resistor with the following color bands:

Band 1: Brown Color

Band 2: Red Color

Band 3: Green Color

Band 4 (Tolerance): Gold Color

Using the formula mentioned earlier:

Resistance = (Band1Value * 100 + Band2Value * 10 + Band3Value) * 10^Band4Value

We know that Brown (value = 1), Red (value = 2), Green (value = 5), Gold (multiplier = ±5%)

Now the Resistance = (1 * 100 + 2 * 10 + 5) * 10^±5%

Resistance = (100 + 20 + 5) * 10^±5%

Resistance = 125 * 10^±5%

So, the calculated resistance value for the given four-band resistor is 125 Ohms with a tolerance of ±5%.

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4-Band Resistor Color Code to Value Calculator
Reviewed by Author
on
July 16, 2023
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