How to convert time to decimal hours/minutes/seconds in Excel?
Suppose you have a range of time or texts with [HH:MM:SS] format in Excel, and now you want to convert them to decimal hours, minutes or seconds, how can you quickly solve it? Here this tutorial will introduce some tricks to handle this task.
Convert time to decimal hours/minutes/seconds with formulas
Convert time to decimal hours/minutes/seconds with Convert Time 
Convert time to decimal hours/minutes/seconds with Super Functions
Convert time to decimal hours/minutes/seconds with formulas
In Excel, you can use some formulas to convert [hh:mm:ss] to decimal hours, minutes or seconds.
1. Select a cell and type the formula =A1*24 into it and press Enter to get the result out, if you need, drag fill handle over range to apply the formula.
2. Right click at the selected range and click Format Cells from context menu. And in the popping dialog, select Number from the Category list, and specify the decimal places you need. See screenshots:
3. Click OK. Now each time has been converted to decimal hour at once.
Tip:
1. You also can use this formula to convert time to hours =HOUR(A1)+MINUTE(A1)/60+SECOND(A1)/3600.
2. If you want to convert time to decimal minutes, use this =A1*24*60 or =HOUR(A1) * 60 + MINUTE(A1) + SECOND(A1) / 60.
3. If you want to convert time to decimal seconds, use this =A1*24*60*60 or =HOUR(A1) * 3600 + MINUTE(A1) * 60 + SECOND(A1).
Convert time to decimal hours/minutes/seconds with Time Convert
If you do not like to remember formulas, you can use Convert Time utility of Kutools for Excel to convert time to decimal hours or minutes or seconds by a click.
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After installing Kutools for Excel, please do as below:（Free Download Kutools for Excel Now!)
Select the time range you want to convert to decimal numbers, click Kutools > Content > Convert Time, and select one option you need from the context menu. See screenshots:
After selecting the converting option, a dialog popped out to remind you how many cells have been converted. Click OK to close it.
Now you can see every time is converted.
Note:
If you want to convert time to decimal numbers and save the result in another location, you can do as these steps:
1. Select the data range and click Kutools > Content > Convert Time > Convert Time. See screenshot:
2. In the popped out dialog, check the converting option you need in Convert Type section and check Save to another location(Convert range is one area) checkbox, then click to select a range to put out the result, and click OK > Ok > OK to close dialogs. See screenshots:
Now the data is converted and saved in another location.
Click here to know more about Time Convert.
Convert time to decimal hours/minutes/seconds with Super Functions
Actually, in Kutools for Excel, you also can use Kutools Functions to convert time to decimal numbers.
After installing Kutools for Excel, please do as below:（Free Download Kutools for Excel Now!)
1. Select a cell you want to put the converted result and click Kutools > Kutools Functions > Date & Time, and select the converting option you need from the context menu. See screenshot:
2. In the Function Arguments dialog, select the data you want to convert into TimeData textbox. The click OK to close the dialog. See screenshot:
3. Then select the converted result and drag the fill handle to a range needed to apply the function. Now the data range has been converted.
In the Kutools Functions group, you can sum or count data by fill/font color, count character, extract text and reverse text string and so on.
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