Poker stat Wilson interval calculator

Enter actions and the matching eligible opportunities. The calculation runs in this page; its code has no external dependencies and makes no network request after load.

Read the full interpretation guide · Review the method and downloadable evidence

A whole number from zero through the opportunity count.
Use the denominator for this action, not all hands. Zero opportunities makes 0/0 undefined.
Leave blank to omit. This arbitrary study cutoff is not poker truth, advice, or a player-type boundary.
The unadjusted Wald interval can collapse or leave the possible 0%–100% range. It is shown only as a cautionary comparison.

What this output covers

It covers binomial sampling uncertainty under independent eligible opportunities and one stable underlying action rate. It does not account for context mixing, strategy drift, selection after looking at many stats, opponent adaptation, measurement errors, or strategic value.

A two-sided 95% confidence interval describes the procedure's repeated-sampling coverage. It is not a 95% posterior probability that the fixed interval contains a player's true rate.