How we calculate

Every number on this site is computed, not copied. The inputs come from the published sources listed on each page, and the arithmetic is the same code that runs in your browser, in the pre-rendered tables, and in this project's tests — so the three cannot disagree.

What varies, and why it earns a page

Pairwise comparison is inherently unique: each page is a genuine 2-way join over real data, so no two pages can share prose without sharing both states. This cluster had the BEST post-incident survival on statecalc (11.2%), which is direct evidence the format holds up. Pairs are capped to real demand rather than emitting all 1,225 combinations.

Structural classifications used here

• Two-state comparison

Why some states share a page

27 pages cover this topic. A jurisdiction earns its own URL only when its rules or numbers change the answer. Where two would produce the same page, they are covered together and the spare URL redirects into it. Publishing near-identical pages is worse for the reader and is a search-quality violation, so this site is built so it cannot happen: the build compares every page against its siblings on two independent similarity metrics and fails if any pair converges.

Limitations, stated plainly

These are estimates for general information, not advice. Local jurisdictions add rules a state-level model cannot capture, and statutes change. Verify with the relevant agency before acting on a number.