Operation on "total" value of Data Table

I have a duration field in my index.

The duration is the time in seconds for which the booking was made.

Screenshot from 2017-09-25 16-17-35

The total shown at the end is in seconds. I want to convert it into minutes OR hours.

Is there any way I can make an operation on this final "total" field ?

Yes there is. If you navigate to Management > Index Patterns, find/search for your field and click on the edit button on the right. In there, you can set the format to Duration and pick how you'd like it to look.