if you can get a few passed pawns and convert them to queens then the margin can be high
What was your biggest material advantage ever?


yah, im playing a game that there was (white) one king v.s (black) 5 pawns, and a rook, i am black and i am winning :D yes, its still playing

the question should never involve extra promoted units...
Here's one game with 18 point lead, no promotion.

One time I changed the board to fill up very square with a queen vs only their king so I had 62 queens and that's the most.

[Site "Chess.com iPhone"]
[Date "06/25/2018 02:40PM"]
[White "AhmadAlbadri (796)"]
[Black "FaxTwire (911)"]
1.d3 d5 2.d4 Nc6 3.e3 Bf5 4.Qf3 Bxc2 5.Nd2 e5 6.Qf5 Bd6 7.Qxc2 Nb4 8.Qa4+ Nc6 9.dxe5 Bxe5 10.Qg4 Nf6 11.Qf3 Qd6 12.Nh3 O-O 13.Ng5 Nb4 14.Qh3 Nc2+ 15.Kd1 Nxa1 16.Qxh7+ Nxh7 17.b3 Nxg5 18.Bd3 Qc5 19.h4 Ne4 20.f3 Nxd2 21.Kxd2 Qc3+ 22.Kd1 Qxd3+ 23.Bd2 Qb1+ 24.Bc1 Bb2 25.Ke2 Qc2+ 26.Bd2 Rfe8 27.e4 dxe4 28.f4 Rad8 29.Rh3 Rxd2+ 30.Kf1 e3 31.Rxe3 Rxe3 32.Kg1 Rxg2+ 33.Kf1 Qf2# {FaxTwire won by checkmate}

For me it was this 15-10 rapid game. +19 without promotions and I ended up with more time on the clock than I started with.

One time I changed the board to fill up very square with a queen vs only their king so I had 62 queens and that's the most.
That's cap you can't do that - it would be a draw by stalemate before
I don't remember too well, but I went into a queen vs. everything else game scenario against a classmate. He had the queen, and I had everything else. Because of time restraints, he resigned.
On another note, the theoretical best material advantage is 8x queen promoted pawns (72) + 1 queen (9) + 2 rooks (10) + 2 bishops and 2 knights (12), resulting in a 103 point material advantage, but that's assuming NOTHING gets captured on one's end, there is no stalemate, draw, or checkmate, there are no time restraints, and your opponent doesn't resign. In a perfect world, you would be up 103 points of material.
Hey everyone! Ever had a game where you ended up WAY up in material and the other guy had nothing to show for it? Do you remember what your biggest was? What was it?
Here's mine: I was up 5 pieces and a pawn (I am not joking) against a classmate I played at school. Can you say "overkill"?