Creating a new system/metric unit - Hrs Mins

[Stimson]

Hi Everyone, 

I'm new to service now and exploring, Can we create new system/metric units like Hrs Mins,

The goal is to find the difference between two datetime columns in Hrs and Mins
 
For example:
Begin: 26-Jan-24 20:25:00
End: 27-Jan-24 07:00:00
difference: 10 Hrs 35 Mins

I used the following script to find out the hours due to which I use Hours as a Unit for the indicator

var diff = function(x, y) {
    return y.dateNumericValue() - x.dateNumericValue();
};
var hours = function(x, y) {
    return diff(x, y) / (60 * 60 * 1000);
};
hours(current.begin, current.end);

 
Is it possible to update the Javascript and create a new measuring unit to display 10 Hrs 35 Mins (Current display: 11 Hrs)