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Using an Input Mask

Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Using an Input Mask.

When inputting time into a cell, it is easy to enter digits—that's what the numeric keypad is for, after all. What can really slow you down is the necessity to enter other characters, particularly ones that require the use of the Shift key. For instance, if you are entering times, it is easy to enter 230 for 2:30, but it is a pain to slow down by entering the colon.

Thus, you may wonder if there is a way to set up an input mask that will add the colon automatically. The good news is yes, there is. The bad news is no, there isn't. Sound confusing? Let me explain...

You can set up a custom format that will display your time in any format you want. For instance, you could use the following steps:

  1. Select the cells you want to use for time input.
  2. Choose Format from the Cells menu. Excel displays the Format Cells dialog box.
  3. Make sure the Number tab is displayed. (See Figure 1.)
  4. Figure 1. The Number tab of the Format Cells dialog box.

  5. In the Category list, choose Custom.
  6. Replace whatever is in the Type box with #":"00 (a pound sign, quote mark, colon, quote mark, and two zeros).
  7. Click on OK.

You can now enter your times using just digits. The problem (and this is the bad news) is that the cell doesn't really contain a time. If you enter 230 (for 2:30), it doesn't contain 2:30 as a time—it contains two hundred and thirty. Thus, you can't use the contents of the cell directly in time calculations.

To overcome this, you can use another column to show the entered digits converted into a time. All you need to do is use a formula to do the conversions. For instance, if the time you entered was in cell A3, you could use the following formula in a different cell to do the conversion:

=(INT(A3/100)/24)+((A3 - (INT(A3/100)*100))/1440)

Format the cell that contains the above formula so it displays one of the various time formats, and you are all set.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (2746) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Using an Input Mask.

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Comments for this tip:

Fcaetus    13 Feb 2014, 07:03
Thanks
Joze    24 Feb 2013, 19:12
I am sorry, there is an error in my formula: the right expression is:
=timevalue(text(a3;"00:00"))
Joze    23 Feb 2013, 09:53
Nice solution. You get the same result if you use a formula =TIMEVALUE(TEXT(A3;"000")). But in this case, if you want to sum time data you have to format cell in which the result should be as "[h]mm:ss". Am I right?

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