**The Gamma function **is widely used in science, business, and engineering. It is useful for the variables which are always positive. For example, the **GAMMA **function in Excel can be very helpful to find the shear strength in engineering calculation.

The above image is an overview of the **GAMMA **function. From this article, I hope you will get the complete idea to use the **GAMMA **function in Excel.

## Download Practice Workbook

You can download the free Excel template from here and practice on your own.

## What Is the Gamma Function?

Actually, **the Gamma function** is the generalization of the factorial function for nonintegral values which was introduced by Leonhard Euler- a Swiss mathematician.

If n is a positive whole number then the factorial (n!) will be defined by-

n!=1×2×3×4×…×(n-1)×n

For example, 4!=4×3×2×1=24. But this formula is invalid if n is not an integer.

The gamma function is defined for any real number z>0(whether or not z is a whole number) as follows.

The table given below shows the Gamma value for the range 0.0083 ≤ n ≤ 5.

The following graph shows the Gamma Function value, **Γ(n) for 0.0083 ≤ n ≤ 5**.

## Introduction to Excel GAMMA Function

The **GAMMA **function is categorized under the Statistical function in Excel.

**Purpose:**

The GAMMA function is used to find the Gamma function value.

**Syntax:**

`=GAMMA(number)`

**Arguments:**

Argument | Required/Optional | Explanation |
---|---|---|

x | Required | A positive real number. |

**Return Parameter:**

The Gamma function returns a numeric value.

**Available in:**

It is new in Excel 2013 and so is not available in the earlier versions of Excel.

## An Example of Excel GAMMA Function

Now we’ll see an example of how to use the **GAMMA **function in Excel. It’s quite simple.

For that, I have made a dataset of some random positive real numbers.

**Steps:**

⏩ Activate **Cell C5**.

⏩ Then type the following formula in it-

`=GAMMA(B5)`

⏩ Later, just press the **Enter **button.

And you will find output 1 for the value 2.

⏩ To copy the formula for the other cells just drag down the **Fill Handle** icon by using your mouse over the cells.

Here’s the all output for the values.

## Errors While Using the GAMMA Function in Excel

You will get errors for some specific values. Because the **GAMMA **function can’t deal with that kind of value. To show that I have rearranged the dataset. I have inserted 0, negative integer, and non-numeric values in the dataset.

At first, let’s find the output-

**Steps:**

⏩ Write the following formula in **Cell C5**–

`=GAMMA(B5)`

⏩ Then press the **Enter **button and use the **Fill Handle** tool to get all the outputs.

Then you will spot the output like the image below. Here you will notice that we’ll get **#NUM **error for 0 and negative integers and **#VALUE** error for non-numeric characters.

## Things to Remember

The input number should be numeric and greater than 0. Otherwise, the **GAMMA** function will return **#NUM!** and **#VALUE!** error.

## Conclusion

I hope all of the methods described above will be good enough to use the **GAMMA** function. Feel free to ask any question in the comment section and please give me feedback.