# How to Find Q1 and Q3 in Excel

To calculate the **Interquartile Range**, you have to first find the first quartile (**Q1**) and third quartile (**Q3**) values. If you divide a dataset into four parts, **Q3** is the 75 percentile of the dataset, and **Q1** is the 25 percentile of the dataset. Luckily, Excel has some ready-to-use quartile functions that you can use to find **Q1** and **Q3** from any **worksheet**. Let’s move on to the detailed process!

### Introduction to the Dataset

In the following dataset, there are two columns, **Company Name**, and **Stock Price**.

The stock prices of each brand are different and are arranged in an arbitrary order. I created a separate table for calculating** Q1** and **Q3**. Now, I am going to calculate **Q3** in cell **B13** and **Q1** in cell **B14**.

## Easiest Way to Find Q1 and Q3 in Excel

The easiest way to find the values of **Q1** and **Q3** is to use the **QUARTILE** function.

**Usage Guide**

### Find Q1

**Step_1**: Take an empty cell, **B13**.

**Step_2**: Now type the following formula:

**=QUARTILE(B2:B11,1)**

**Formula Explanation**

**B2:B11**is the selected array or data range. It is a compulsory**argument**.**1**is the 1st quartile, which is the 25 percentile. It is also compulsory.

**Step_3:** Press **ENTER** to see the result.

**Final Result >**

As shown in the figure below, cell **B13** has the value for **Q1** for the array **B2** to **B11**:

### Find Q3

**Step_1**: Take an empty cell, **B14**.

**Step_2**: Now type the following formula:

**=QUARTILE(B2:B11,3)**

**Formula Explanation**

**B2:B11**is the selected cell range.**3**is the 3rd quartile, which is the 75 percentile.

**Step_3:** Press the **ENTER** key.

**Final Result >**

The value of **Q3** is in cell **B14**.

To **Find the Interquartile Range in Excel**, you have to calculate the difference between **Q3** and **Q1**.

Let’s say, I want the **Interquartile Range** for this dataset. In that case, the formula for finding the **Interquartile Range** is:

**=B14-B13**

Otherwise, you can directly calculate the **Interquartile Range** with this formula:

**=QUARTILE(B2:B11,3)-QUARTILE(B2:B11,1)**

Either of the formulas will deliver the same result. For my dataset, the result is **$217,492.50**.

## Conclusion

I hope you got an overall idea about finding **Q1**, and **Q3**, and how to find the **Interquartile Range** in Excel. If you’d like to know more about using Excel, visit our blog page anytime! Also, if you find something confusing about this topic, feel free to leave a comment in the comment section. Thank you!

### Frequently Asked Questions

#### How to do Q1 and Q3 on Excel?

To find the values of Q1 and Q3, use the **QUARTILE** function. Suppose my array is A1:A50. Now to calculate Q1, use the formula** = QUARTILE (A1:A50,1)** in an empty cell. Next, to calculate Q3, type the formula **= QUARTILE (A1:A50,3)** in another empty cell.

#### How do you find the Interquartile Range (IQR)?

Subtract the 3rd quartile from the 1st quartile to calculate the IQR. The basic formula to find the IQR in Excel is **= QUARTILE(array,3) – QUARTILE(array,1)**.

#### Should I use QUARTILE INC or QUARTILE EXC in Excel?

If your data set contains the entire population and you want to include the minimum and maximum values in your quartile calculation, you should use **QUARTILE.INC **function. However, if your data set is a sample and you want to exclude the minimum and maximum values, you should use **QUARTILE.EXC** function.

#### Are Q2 and IQR the same?

Q2 and IQR are not the same. Using the median as a substitute for the IQR can be misleading and inaccurate. The median only represents the middle value, whereas the IQR considers the lower and upper quartiles.