## How to convert column letter to number or vice versa in Excel?

This article, I will talk about how to convert column letter to column number or convert column number to letter. Such as, convert column letter AA to the number 27, or convert column number 100 to letter CV. To get the solution with following methods.

**Convert column letter to number or vice versa with formulas**

**Convert column letter to number or vice versa with User Defined Function**

#### ** Convert column letter to number or vice versa with formulas**

To convert the column letter or label to number or vice versa, the below formulas may help you, please do as this:

**Convert column letter to column number:**

Please enter this formula: **=COLUMN(INDIRECT("AB1"))** into a blank cell where you want to locate the converted result, and then press** Enter** key to get the column number:

**Note:** In the above formula, * AB *is the column letter that you want to get the column number based on, you can change it to your need.

**Convert column number to column letter:**

Please type this formula: **=SUBSTITUTE(ADDRESS(1,200,4),1,"")** into a blank cell to get the result, and then press **Enter** to get the column letter as follows:

**Note:** In the above formula, the red number **200** is the column number that you want to convert to column letter, you can change it to your need.

#### ** Convert column letter to number or vice versa with User Defined Function**

Except the formulas, here, I can also introduce the **User Defined Function** to deal with this task.

**Convert column letter to column number:**

**1**. Hold down the **ALT + F11** keys, then it opens the **Microsoft Visual Basic for Applications** window.

**2**. Click **Insert** > **Module**, and paste the following code in the **Module** Window.

**VBA code: convert column letter to column number:**

```
Public Function ToColNum(ColN)
ToColNum = Range(ColN & 1).Column
End Function
```

**3**. Then save and close this code, go back to the worksheet, and enter this formula: **=Tocolnum("VV")** (* VV* is the column letter that you want to convert number. ) into a blank cell, and press

**Enter**key to get the column number, see screenshot:

**Convert column number to column letter:**

**1**. Hold down the **ALT + F11** keys, then it opens the **Microsoft Visual Basic for Applications** window.

**2**. Click **Insert** > **Module**, and paste the following code in the **Module** Window.

**VBA code: convert column number to column letter:**

```
Public Function ToColletter(Collet)
ToColletter = Split(Cells(1, Collet).Address, "$")(1)
End Function
```

**3**. Then save and close this code, go back to the worksheet, and enter this formula: **=ToColletter(50)** (* 50* is the column number that you want to convert to letter. ) into a blank cell, and press

**Enter**key to get the column number, see screenshot:

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