#### Convert Column Letters to Number

```Hi!

I'm looking for a function to convert a "large" column letters (up t
10 characters) to it's equivalent in number.

e.g.

Input=A
Output=1

Input=AAA
Output=703

Input=EXCEL
Output=2,708,874

Any suggestions?

Regards

--
Message posted from http://www.ExcelForum.com

```
 0
9/14/2004 8:34:23 PM
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```Here's a VBA function that gives the results you want:

Option Explicit

Function ColumnToNumber(sText As String) As Variant
Dim Bytes() As Byte
Dim Letter As Long
Dim Multiplier As Double
Dim N As Double
Dim Total As Double

ColumnToNumber = CVErr(xlErrValue)
If Len(sText) = 0 Then Exit Function

Bytes() = UCase\$(sText)
Total = 0
Multiplier = 1

'least significant letter is at the top of the array
For Letter = UBound(Bytes()) - 1 To 0 Step -2

N = Bytes(Letter) - 64 'A = 65: translate to 1
If N < 1 Or N > 26 Then Exit Function

Total = Total + N * Multiplier
Multiplier = Multiplier * 26

Next Letter

ColumnToNumber = Total

End Function

On Tue, 14 Sep 2004 15:34:23 -0500, Polos
<<Polos.1clbj9@excelforum-nospam.com>> wrote:

>Hi!
>
>I'm looking for a function to convert a "large" column letters (up to
>10 characters) to it's equivalent in number.
>
>e.g.
>
>Input=A
>Output=1
>
>Input=AAA
>Output=703
>
>Input=EXCEL
>Output=2,708,874
>
>Any suggestions?
>
>Regards,
>
>
>---
>Message posted from http://www.ExcelForum.com/

```
 0
anonymous (74721)
9/14/2004 10:22:09 PM
 Reply:

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