Why do brackets bust every March? Because even the best team must win several games in a row, and each is a fresh chance to be knocked out.
Tournament Bracket OddsLive
who wins it all?
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In a single-elimination bracket, the best team is far from guaranteed to win — it must string together several wins, each a fresh chance to be upset. Simulating thousands of tournaments reveals the true championship odds for each seed. With little skill spread the field is wide open; with a big gap the top seed dominates, but even then rarely tops 50%.
Reading this result: At this moderate spread the top seed takes about 22% of titles: favored, but each single-elimination round is a fresh chance to be knocked out.
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How it works
A single-elimination tournament punishes any slip. Simulating thousands of runs of the bracket, with each game decided by the seeds' relative strength, reveals the true championship probability for every seed. When the field is evenly matched the odds spread wide; even a dominant favorite rarely exceeds a coin flip to win it all — the mathematics of March Madness.
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The math, the assumptions, real-world uses, or a code translation — explained for this exact simulation.
Is this tournament bracket odds tool really free?▾
Yes. Tournament Bracket Odds runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.