Length of courses in minutes

It would be nice to see the whole length of a course in hours and minutes.
I am pretty sure it is not hard to calculate and display. But it would be very useful.

Nobody finds it useful?

So, this is a very general rule of thumb, but in my experience, each full lesson, which is roughly 2000 words, usually will equal roughly 15 minutes of an audiobook. Maybe this will help as a general metric.