Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, and 2013. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Using an Input Mask.
by Allen Wyatt
(last updated May 17, 2016)
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:
Figure 1. The Number tab of the Format Cells dialog box.
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 (12550) applies to Microsoft Excel 2007, 2010, and 2013. You can find a version of this tip for the older menu interface of Excel here: Using an Input Mask.
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