Bayes theorem

Client

Posterior from likelihood, prior, and evidence.

P(A|B) = P(B|A)P(A)/P(B)—enter as decimals.

About Bayes theorem

P(A|B) = P(B|A)P(A)/P(B)—enter as decimals. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

P(A|B) ≈ 0.180000

Common use cases

  • Bayes theorem for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Open the page directly—multi-field inputs are not URL-prefilled.

More tools

Related utilities you can open in another tab—mostly client-side.