No way to really tell. Different rating pools, etc. All that said? Consensus seemed to be from reading dozens of previous threads: Online, way inflated. Standard, a little inflated. Blitz, a little deflated. Bullet, who cares. Do a forum search and wade through some of the other threads if you're really interested though.
How similar is chess.com rating?
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Mar 15, 2014
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#3
It averages 200 to 300 points lower. If you've never played in a live event, it's going to be even lower, environmental stressors. The ratings here are only for chess.com. Tactics Trainer rating is only for tactics trainer, and Chess Mentor rating is only for Chess Mentor.
Obviously, chess.com rating won't be the same as what your rating would be in the fide rating. But, if I decide to sign up for fide rating should I expect to have a rating similiar to chess.com or a lot less. How much is the difference between your chess.com rating and your fide rating?