A simpe question

How is the difference between a mistake and a blunder figured? I make plenty of each.

https://support.chess.com/en/articles/8572705-how-are-moves-classified-what-is-a-blunder-or-brilliant-and-etc

Chess.com has a peculiar and not very logical way to do that.

Better:
A mistake (?) is a move that either turns a drawing position into a losing position,
or a winning position into a drawing position.
A blunder (??) is a move that turns a winning position into a losing position.

That is the definition by GM Robert Hübner:
'I have attached question marks to the moves which change a winning position into a drawn game, or a drawn position into a losing one, according to my judgment; a move which changes a winning game into a losing one deserves two question marks'

You must be a bonafide genius

Seems you have a nice mix of them, no worries.

Blunder is losing a piece. Mistake is worsen your position significantly. Usually the blunder has a clear and direct explanation for a thing you missed.

In end games, if you're losing you won't get any blunders, because the engine knows you're suffering and almost every move is a pain.

None of these is true. Or even sensible.

Read the link that Martin_Stahl posted. Refrain from spreading nonsense.

A mistake I think is something that the engine reads as minus 1-2ish point and a blunder is -3 or more im not sure there could be a different system than a eval bar

@7

There is a huge difference between me and Martin.

Martin sent him to an outside link. I wrote my answer in a comment which I believe it's accurate. After analyzing hundred of my games, I became more familiar with their move category.

It's an accurate assessment.

For most moves it's based on evaluation changes and blunders will often correlate with losing material, though not always.

When a player is completely losing, any move is considered at least good. At least it's been that way for a while but is always possible it will change in future versions.

"Losing" and "completely losing" are two different things. What you wrote is only true for really hopeless positions, not for all bad positions. Also, why would that be "in end games" only?

And the first paragraph contains misleading things too. "Blunder is losing a piece" is obviously not true, blunders come in all forms.

A mistake is when a position is bad but holdeble for ex traping a knight could be a mistake but not a blunder because you can get a couple pawns a blunder is a loosing move that either 1.is the reason you lost the game like hanging a piece for pawn or 2. You have almost no compensation sometimes not true) ex.hanging a knight for free

@11

Blunder is losing a piece. Nothing more. Whether it's a checkmate mistake which would lead you to losing a big piece "King" or a Pawn in 2 or 3 next moves. You will never get a blunder for a move that worse your position.

Yes, maybe not necessarily in end games, but whenever the evaluation bar gives a difference of more than 3 between you and your opponent.. the worst move would be "good" as Martin said.