The odds of finishing with a perfect bracket (guessing all the games correctly) is 1-in-120 BILLION! That’s assuming you know something about college basketball going in, and consider how the teams are seeded.

If you’re a non-fan who just guesses based on something arbitrary like flipping a coin, the odds soar to 1-in-9.2 QUINTILLION!!
One mathematician put it this way: “You have better odds of winning the Powerball with two consecutive tickets than getting a perfect bracket…
“[And] you have better odds that a family of four will all get hit by lightning [separately] in their lifetime.” (Which is kind of bleak, but sure.)
And: “There’s a 1-in-10,000 chance that you get injured by a TOILET in your lifetime, so there are better odds that that same family of four all get injured by a toilet than picking a perfect bracket.”
And NO ONE has officially submitted a perfect bracket EVER. The longest streak of perfection was a neuropsychologist from Ohio who managed to pick the winner in the first 49 games in 2019 correctly. There are 63 games in total…
Source: CNN