I'm almost 1600 OTB in regular time controls but have problem breaking 1200 blitz. I either suck at blitz or people here are better at it than me (or some combination). 
So, can't say if you are underrated or not.
Are we underated ?
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Mar 25, 2016
0
#2
I read that Chess.com uses the Glicko system, and your club may use ELO, which could account for the difference.
https://www.chess.com/article/view/chess-ratings---how-they-work
Is your club rating an official Canadian rating or just something your club makes up?
I would expect an active 1400 standard player here to be equivalent to that in national rating.
Maybe you should compare your official rating with standard rating instead of blitz. In blitz you can lose on time, something which has much less chances to happen in long OTB games.
This should be the first permalink on the forums, seriously
https://www.chess.com/blog/smarterchess/chesscom-rating-comparison-2015
Mar 25, 2016
0
#7
natello35 wrote:
Maybe you should compare your official rating with standard rating instead of blitz. In blitz you can lose on time, something which has much less chances to happen in long OTB games.
The OP was talking about his standard/rapid rating.
Hi. In my club my rating is about 1400. But on chess.com I am 900! :/ Am I the only one who has this différence )?