consistently not making blunders = what ELO rating ?

what ELO rating are people here at Chess.com when they consistently don't make blunders as defined by Chess.com computer analysis (200 centipawns?)

I mean... that depends on the time control and how complex the position is.

Even GMs will blunder 200 centipawns (the equivalent of 2 pawns) in long games. In GM blitz games a blunder of that size probably happens practically every game.

That's why engines can beat humans... they see ways to win material that we miss.

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However you're probably more interested in when people stop making simple unforced blunders in relatively calm positions.

I'd say ~1300 blitz is very consistent at not e.g. moving a piece to an attacked square with no defense.

I'd say ~1600 blitz is very consistent at not blundering material to simple 1-2 move tactics (like basic forks and removing the defender) As for uncommon and tricky 1-2 move tactics, when other things in the position are distracting, basically everyone is able to miss those, even GMs.

Avoiding basic blunders might sound easy, but to do it in >99% of your moves in >99% of your games takes a lot of practice. For most people at least 2 years of playing I'd say.

Unfortunately, the answer seems to be "never". I was looking through a game from the world rapid between two 2450+ IMs, both of whom performed above their rating overall.....and one of them hung her queen to a discovered check. It was a long game after a long day, she was in time trouble, but still....it's the sort of position I wouldn't make into a puzzle because even a 900 could see it immediately. Yet this player, stronger than basically everyone on the forums (including the titled players), hung her queen. The question isn't whether you will blunder, it's how often. Someone like me is 98% effective (big blunder once every 50 moves in slow chess), an expert pushes that to 99, and masters start putting on decimal places, but nobody gets to 100, not even stockfish.