I've seen a "days of my life spent on anime" signature on an anime site. You know, where it counts just how many days you've spent on anime. Makes sense, right? 😛
Does there also exist a "days of my life spent on manga" signature? Because I really would like to know how much I've been reading manga.

♥♥♥Yaoi, Gay Books, Music, Manga, Anime, Internet Connection, Prison Break, Animals And Fantasy. They're My Drug, My Hope, My Dreams And My Obsession♥♥♥

Yes, I agree. Because I need yet another excellent tool with which to gauge my self-loathing... the problem being how to quantify each individual's reading speed.

An average based on 100 chapters? Or maybe it'd have to be something only an online reader could measure? Hmmm...

Anime runs at a specific pace. Hard to estimate how fast you read or view pages. Some series have extremely detailed pages of let's say battle scenes with little text. Viewing this can take 3 seconds or 2 minutes. You don't need to watch any episodes to know how many seconds it will take with anime as they have broadcasting schedules, but you must read every manga to have a general idea of the pace.