How to Calculate Quintiles in Excel (With Examples)


In statistics, quintiles are numbers that split a dataset into five groups of equal frequency.

The first quintile is the point where 20% of all data values lie below it. The second quintile is the point where 40% of all data values lie below it, and so forth.

We can use the following function to calculate the quintiles for a dataset in Excel:

=PERCENTILE(CELL RANGE, QUINTILE)

The following example shows how to use this function in practice.

Example: Calculate Quintiles in Excel

Suppose we have the following dataset with 20 values:

The following image shows how to calculate the quintiles for the dataset:

The way to interpret the quintiles is as follows:

  • 20% of all data values lie below 6.8.
  • 40% of all data values lie below 14.
  • 60% of all data values lie below 20.8.
  • 80% of all data values lie below 26.2.

We can also use the following formula to calculate each quintile at the same time:

=PERCENTILE(CELL RANGE, {0.2, 0.4, 0.6, 0.8})

The following image shows how to do so:

Notice that the quintiles calculated here match the quintiles we calculated earlier.

Additional Resources

How to Calculate Deciles in Excel
How to Calculate a Five Number Summary in Excel
How to Calculate the Interquartile Range (IQR) in Excel

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