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Excel Formula: Add dashes to phone numbers

Here is a list of phone numbers in a worksheet, but generally, you rather like to add dashes to separate the phone number for better read as below screenshot shown, how can you use a formula to quickly add dashes to them in Excel? This tutorial will give you an answer.
doc abbreviate words 1

Generic formula:



Phone_num: the number you want to add dashes.
N1: the first position of number string you want to add dash.
N2: the second position of number string you want to add dash.

How this formula work

Here is a phone number in cell B3 which you want to add dashes, please use below formula in a cell:


Press Enter key, the dashes have been added in specified position.
doc add dashes to phone number 2


REPLACE function is used to find and replace text specified by location in given text with a new text.

The inside REPLACE function REPLACE(B3,4,0,"-") adds dash at the front of the forth character in cell B3.
doc add dashes to phone number 3

It returns 313-5512345.

Then the outside REPLACE function can be seen as
Which adds dash at the front of the eighth character in text string 313-5512345.

Sample File

doc sampleClick to download sample file

Relative Formulas

Relative Functions

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