You can find it, in my profile for example. Users just have to fill it in themselves.
Find your rating on chess.com
It's not really clear what you are asking when you say "real" rating. Are you asking for something that would estimate what is your Over-the-Board (OTB) rating (FIDE or USCF)? There is no way to really know what your OTB rating would be until you actually establish an OTB rating because the pool of players is different. They do not mathematically correlate.
I think OP is looking for someyhing like http://www.elometer.net/ but built into Chess.com . Not really sure what the benefit is.
Maybe it could be useful for newly joined, so first they go through "elometer" before playing human opponents. This would decrease chances they storm through 1200 rated who would face superior opponent if newly registered is some GM. That actually happened to me and I lost 4 consecutive games to a GM who was just registered at the time.
I think it would be cool to find your real chess rating on this site. It would really help a lot of people out, & other elo finder's UI are really bad. It can also be used for adding or subtracting points on a game if you lose or win. They should have 20-30 random puzzles you do to find it. (most of them aren't mate in 1). It would be useful. Thanks!