How To Find Interquartile Range In Excel

Use the QUARTILE function in Excel to find the interquartile range of a dataset by subtracting the first quartile value from the third quartile value.

Calculating the interquartile range is a crucial statistical measure that helps us understand the dispersion or spread in a dataset. It provides valuable insights into the distribution of data points and is widely used in various fields, including finance, research, and data analysis. While there are several methods to compute the interquartile range, Excel offers a straightforward and efficient approach. In this blog post, we will explore how to find the interquartile range using Excel, step-by-step, ensuring you have all the tools and knowledge to confidently analyze your data and extract meaningful information. So, let’s dive in and unlock the power of Excel in calculating the interquartile range!

How To Find Interquartile Range In Excel: Step-by-Step


Step 1: Input Your Data

Input your data set into an Excel spreadsheet, ensuring it is organized either in columns or rows. Excel provides numerous features for data manipulation and analysis, allowing you to efficiently work with your data and extract valuable insights.

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Step 2: Decide on your Interquartile Range Placement

Decide where you would like the Interquartile Range (IQR) to be calculated. It can be in any empty cell of your choosing in a spreadsheet or any other software used for data analysis. This flexibility allows you to easily analyze and interpret the spread of data without any limitations.

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Step 3: Use QUARTILE Function for Q1

In order to calculate the Interquartile Range (IQR), simply go to the desired empty cell and enter the formula ‘=QUARTILE(array, 1)’, where ‘array’ represents the range of cells containing the data set. Then press ‘Enter’.

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Step 4: Use QUARTILE Function for Q3

The formula ‘=QUARTILE(array, 3)’ can be used to calculate the 3rd quartile of a data set stored in an array of cells. This formula can be entered into an empty cell and will provide the desired result when the ‘Enter’ key is pressed.

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Step 5: Subtracting Q1 from Q3

To calculate the interquartile range (IQR), subtract the value of the first quartile (Q1) from the value of the third quartile (Q3). Enter the formula ‘=Q3 cell – Q1 cell’ in a new empty cell and hit ‘Enter’. This will give you the IQR.

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Step 6: Record the Interquartile Range

The value calculated in the cell from Step 5 represents the Interquartile Range, a measure of statistical dispersion used to analyze data variability.


In conclusion, knowing how to find and interpret the interquartile range in Excel can be a valuable skill for anyone working with data. By following the step-by-step instructions provided in this blog post, you can confidently calculate the interquartile range and gain insights into the spread and variability of your data. Whether you are analyzing sales figures, survey responses, or any other dataset, Excel provides a powerful and efficient way to determine the interquartile range. Remember, the interquartile range is just one measure of variability, so it’s important to consider other measures as well to get a complete picture of your data. With practice and familiarity, you’ll soon be able to harness the power of Excel to analyze and interpret data with ease. So go ahead, use Excel to unlock the secrets hidden within your data and make informed decisions based on the interquartile range. Happy data analyzing!

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