What is the conversion factor between USCF rating and Chess.com ratings?

I currently have a USCF rating at about 1300, but my chess.com Rapid is about 1900, my blitz is usually between 1750 and 1800, and my bullet is a little over 1700. Does anyone know what this usually translates to in over the board ratings? 

By what I have seen the difference is like 200-300 points

Isn't a USCF rating obtained from playing over the board? So you already have an OTB rating of 1300?

I'd agree that 200-300 is typical, but there's a fairly wide range. I'd bet that the poster is simply much better at fast chess than at slower time controls -- that is, he's not much more accurate when he has extra time than he is when he plays quickly. I'm the opposite -- much better at avoiding mistakes and working things out correctly when I have plenty of time. So my USCF rating is only about 100 points worse than my online rapid rating, and it's *better* than my online blitz and, especially, bullet ratings.

not sure where your peak is at now but i would guess probably around 1700-1800 uscf based on where i am at and a good friend of mine is. i hover in the 1800s in rapid most of the time on here and have a peak in the low 2000s and am rated 1735 uscf otb atm after peaking at 1741, and my friend is in the 1900's regularly on here, has a peak also in the low 2000s and is consistently in the 1800's in USCF and has a peak in USCF OTB in the low 1900s. The top end gets pretty wild though, we know several 18's and 19 uscf players that are local and have 2000 and 2100 rapid ratings on here.

For me my chess.com rapid is 1050 and blitz is 850, but my otb uscf rating is 650 and online uscf quick rating is 1009 as well as my online blitz rating being 1200 and my online regular rating being 800. I mainly played USCF rated 7 min in chess.com