I like the idea, if only because it tells me whether or not I have the moment to read it at that moment (less than 2 minutes or so) or send it to Pocket where I'll read it during the time I set aside for that.

That being said, I wrote a quick set of functions to handle this: https://gist.github.com/norcross/d10e26839699f61c00b7 One function to save the seconds, one to do the calculation, and one to display it. basic, but it does the job.