OTB vs Chess.com rating

No correlation set in text. All you can do is do your own research and and give an approx. There is an article on here somewhere showing a master's estimation for various blitz and standard/rapid to fide.
An accurate way to estimate what your rating could be is play someone with an established fide rating and evaluate.

generally... if you plays Lots of blitz and get used to the long tc
blitz=uscf
if you play lots of standard (and get used to the long tc), your uscf is usually a good bit less
standard-200=uscf
there is a correlation though. just keep in mind, they "added points" to the standard pool and this messed up correlations between standard and uscf
Somewhere on here there's an article that estimates chess.com blitz ratings are 100-150 points below OTB ratings. If I remember right, a 1500 blitz player is estimated to be 1640-ish uscf. I think it's fairly accurate. I've been around 1500 blitz for a while and I've won and lost against 16-1700 uscf players on here in standard so if I had an OTB rating, it'd probably be somewhere in that range.
Can you guys please share ur otb rating.