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Decile Calculator


Our Decile Calculator is a data analysis tool designed to assist in organizing ungrouped or raw data by breaking it into ten equal parts (1st to 10th) or groups. This division aids in understanding and identifying the distribution of patterns and trends within the unprocessed dataset.

Step to Use Decile Calculator:

Using the decile calculator with solution is a simple and effective way to analyze valuable insights from your data more deeply. This is a user-friendly tool and doesn’t require any complex statistical knowledge, making it accessible so that everyone can use it easily.

Follow these simple steps to make the most out of this tool:

What to Enter?

  • Enter the data value (separated by commas)
  • Enter the decile value number

What will you Get?

  • Decile Values: All the decile values along with step-by-step calculations

What is decile in statistics?

In statistics, 

"A decile is a data point that divides a dataset into 10 equal parts with each part representing 10% of the data’s distribution".

In simple words, a decile is like cutting a cake into 10 equal pieces, where each piece represents a different part of something.

Decile Formula:

Here is the basic formula of decile that our decile calculator uses while functioning to give you accurate results:

$$ D_k = \frac{(n + 1) \cdot k}{10} $$


  • Dk – Represents the value of the $ k^{th} $ decile
  • N – Total number of data points in the dataset
  • K – The specific decile you want to find

How to Find Decile?

Calculating deciles is a useful statistical technique that allows you to easily calculate the values with the help of the decile formula. Here is an example that clears all your confusion about decile calculations. You can also calculate this with our free decile calculator.


Imagine you have a dataset of test scores from a class of 30 students. You want to find the decile score at position 3 (k = 3). Here's how to calculate it:


First, determine the number of data points (n), which is 30 in this case.

Use the formula:

$$ D_k = \frac{(n + 1) \cdot k}{10} $$

Put the values into the equation:

$$ D_3 = \frac{(30 + 1) \cdot 3}{10} $$

$$ D_3 = \frac{31 \times 3}{10} $$

Calculate the numerator: 

$$ 31 \times 3 = 93 $$

Now, divide the result by 10:

$$ D_3 = \frac{93}{10} $$

$$ D_3 = 9.3 $$

So, the 3rd decile score in this dataset is 9.3. This means that approximately 30% of the data falls below this score which divides the dataset into ten equal parts.


How is decile different from percentile?

A decile splits data into ten equal parts, each representing 10% of the total. On the other hand, a percentile splits data into 100 equal parts, each representing 1% of the total.

What does 1st decile (D1) signify in a dataset?

The 1st decile represents the lowest 10% of the dataset indicating the range of the lowest values in the dataset. Whereas D10 indicates the highest value in a dataset.

In what fields are deciles commonly used?

Deciles are widely used in various fields like finance, healthcare, education, and social sciences to help analyze income distributions, exam scores, and other data sets.

References: What Is a Decile? How to Calculate a Decile, and Deciles in Finance and Economics