**How to sum time and format as hours, minutes or seconds in Excel?**
https://www.extendoffice.com/documents/excel/3355-excel-sum-time-and-format.html

Sum time and format as decimal hours/minutes/seconds Select a blank cell, and type =SUM (A2:B2) into it, and then press Enter key and drag the auto fill handle over the... Keep selecting the formula cells, and click Kutools > Content > Convert Time, and choose the option as you need. See...

Select a blank cell, and type =SUM (A2:B2) into it, and then press Enter key and drag the auto fill handle over the...

Keep selecting the formula cells, and click Kutools > Content > Convert Time, and choose the option as you need. See...

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