How to convert a time into minutes in Excel and also how to get minutes back into a time format. For instance, change "2:30" into 150 since there are 150 minutes in 2 hours and 30 minutes; then I'll show you how to change it back from 150 to "2:30".
Change a time format into minutes like this:
=A1*24*60

Result:

Make sure that the cell that contains the minutes is formatted as General and NOT as a date or time.

Change a time format into minutes like this:
=A2/24/60

Result:

Make sure that the cell that contains the time is formatted in a time format or you will see a decimal number.
For this example, right-click the cell (B2) and choose Format Cells and go to the Number tab and choose Custom and then h:mm from the list on the right.

Remember that time is stored as a decimal. This is why we can use simple math to calculate the total minutes from a time-formatted number.
To learn more about dates and times in Excel, check out our Date/Time Tutorials for Excel.
Make sure to download the attached file to work with these examples in Excel.
Follow along with the tutorial by downloading the files used in it. (Completely Free)