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Often you may want to count duplicate values in Google Sheets.

Fortunately this is easy to do using the **COUNTIF()** function.

The following example shows how to count duplicate values for the following dataset in Google Sheets:

Letâ€™s jump in!

**Example: Count Duplicates in Google Sheets**

Suppose we have the following dataset that contains the names of various basketball teams:

We can type the following formula into cell **B2** to generate a list of unique team names from column A:

=UNIQUE(A2:A14)

The following screenshot shows how to use this formula in practice:

We can then type the following formula into cell **C2** to count the number of duplicate values for the Mavs team:

=COUNTIF($A$2:$A$14, B2) - 1

We can then click and drag this formula down to each remaining cell in column C to count the number of duplicate values for each team:

From the output we can see:

- Mavs have
**3**duplicate values. - Warriors have
**2**duplicate values. - Hawks have
**1**duplicate value. - Kings have
**0**duplicate values.

And so on.

Note that his formula counts how many times each unique value occurs and then subtracts one.

Thus, if a team name only occurs once, then the formula returns **0** to indicate that the team has 0 duplicate values.

If youâ€™d like to calculate the total number of duplicate values in the entire dataset, you can type the following formula into cell **D2**:

=SUM(C2:C8)

From the output we can see that there are **6** total duplicate team names in the dataset.

**Additional Resources**

The following tutorials explain how to perform other common tasks in Google Sheets:

How to Use COUNTIF Contains in Google Sheets

How to Use COUNTIF with Wildcards in Google Sheets

How to Count Cells with Text in Google Sheets