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Format MAC addresses in cells by adding colon symbol in Excel

Author: Siluvia Last Modified: 2023-11-03

Imagine you have a worksheet filled with a list of alphanumeric strings, and your goal is to transform each alphanumeric value in these strings into MAC addresses by inserting colons, as illustrated in the following screenshot. How can you efficiently achieve this? This tutorial provides straightforward methods to help you tackle this challenge.

Format number and text as mac address with formula
Easily format number and text as mac address with Kutools for Excel
Format number and text as mac address with VBA


Format number and text as mac address with formula

The below formula can help you format a given string as mac address. Please do as follows.
  1. Select a blank cell, enter the following formula and then press the Enter key to get the first result. See screenshot:
    =LEFT(A2,2)&":"&MID(A2,3,2)&":"&MID(A2,5,2)&":"&MID(A2,7,2)&":"&MID(A2,9,2)&":"&RIGHT(A2,2)
    Note: In the formula, A2 is the first cell in the list of strings to be formatted as mac format.
  2. Select the first result cell, drag it's Fill Handle down to get the rest of mac addresses. See screenshot:

Easily format number and text as mac address with Kutools for Excel

The formula provided in the method above does not look very easy to grasp. If you are looking for a simpler solution, then the Add Text utility of Kutoos for Excel is highly recommended. Using this utility, you can easily add colons to cells at specified positions to quickly format the steing in those cells as mac addresses. Please follow the steos below.

After downloading and installing Kutools for Excel, go to the Kutools tab, select Text > Add Text to open the Add Text dialog box, and then configure as follow.

  1. Select the cells that contain the strings that need to be formatted as mac addresses.
  2. Enter a colon in the Text box.
  3. Select the Specify position option, and then enter the numbers that represent the locations where you want to add the colons.
    Tip: In this case, I need to add a colon after every two numbers in cells, so I enter 2, 4, 6, 8 and 10 separated by commas. See screenshot:
  4. Click the OK button.

Result

Strings in the selected cells are now formatted as mac address as shown in the screenshot below.

Notes:

Format number and text as mac address with VBA

You also can apply VBA code to format number and text as mac address in Excel. Please do as follows.

  1. Press the Alt + F11 keys simultaneously to open the Microsoft Visual Basic for Applications window.
  2. In the Microsoft Visual Basic for Applications window, click Insert > Module. Then copy below VBA code into the new Module code window.
    VBA code: Format numbers as mac addresses in cells
    Sub FormatMAC()
    'Updated by Extendoffice 20231103
        Dim I As Long
        Dim xRg As Range
        Dim xCell As Range
        Dim xVal As String
        Dim xStr As String
        On Error Resume Next
        Set xRg = Application.InputBox("Please select range:", "Kutools for Excel", Selection.Address, , , , , 8)
        If xRg Is Nothing Then Exit Sub
        On Error GoTo 0
        For Each xCell In xRg
            xVal = xCell.Value
            If InStr(xVal, ":") > 0 Then
                xVal = Replace(xVal, ":", "")
            End If
            For I = 1 To Int(Len(xVal) / 2)
                xStr = xStr & Mid(xVal, 2 * I - 1, 2) & ":"
            Next
            xCell.Value = Left(xStr, Len(xStr) - 1) 'Remove the last ":"
            xStr = ""
        Next
    End Sub
    
  3. In the opening Kutools for Excel dialog box, select the cells that contain the strings you want to format as mac address, and then click the OK button.

Then you can see the selected cells are formatted as mac address as shown in the screenshot below.


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Comments (5)
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This comment was minimized by the moderator on the site
For the German Excel users: =LINKS(A2,2)&":"&TEIL(A2,3,2)&":"&TEIL(A2,5,2)&":"&TEIL(A2,7,2)&":"&TEIL(A2,9,2)&":"&RECHTS(A2,2)
This comment was minimized by the moderator on the site
That is not correct. The commas should be replaced by semicolons.

=LINKS(A2;2)&":"&TEIL(A2;3;2)&":"&TEIL(A2;5;2)&":"&TEIL(A2;7;2)&":"&TEIL(A2;9;2)&":"&RECHTS(A2;2)
This comment was minimized by the moderator on the site
Hello!!

VBA code in not correct; the instruction 19 add a first and new block of numbers with a zero and the first number of the mac address to format.
This comment was minimized by the moderator on the site
Hi Antonio,
Thank you for your feedback. The code has been updated, please give it a try.
This comment was minimized by the moderator on the site
You can Format Mac Addresses using stringlearner.com. Much easier.
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