Calculation issue

In my form, I want if total minutes is more then 60 minutes then it add 1 hour is total hours.

How can i achieve this?

To achieve that you will have to add one additional calculation field to your form and to use floor Math function. You can set your calculation like this. 

Form Calculation - Math Function Reference

For minutes you will have to also add one additional field and you will have to use Update/calculate conditional logic. You will need to create multiple conditions, for each time range. On my demo form I have set conditions like this. 

This is an example how calculation will work. 

Here is my demo form: https://form.jotformpro.com/71532353957966 

Feel free to test it and clone it. 

Hope this will help. Let us know if you need further assistance.