Win Streak Probability Calculator

Why long streaks are rarer than they feel

Winning several games in a row becomes dramatically less likely as streak length grows, even with decent single-game odds - since the probabilities multiply together rather than simply adding.

Worked example

For a 50% single-game win probability, winning 5 games in a row:

P(streak) = 0.5^5 = 3.125%

Games in a Row	Probability (50% each)
2	25%
3	12.5%
5	3.125%
10	0.098%

This assumes each game is a fully independent event with no memory of previous results - a common source of the "gambler's fallacy," where people mistakenly believe a losing (or winning) streak makes the next outcome more or less likely, when truly independent games don't work that way.