A live dice tracker that turns a craps session into charts as it happens — built to show what probability actually looks like over a real run of rolls, rather than in a textbook.
You enter each roll as it lands. From that single stream of dice, the page builds a dozen different views: the running average against its expected 7, the shape of the totals against the bell curve, and cumulative progress lines for hardways, sevens, the field, and the rare combinations — each against the count the maths predicts.
Everything updates on every roll. There's no save button, no submit step, and no waiting: pick two dice and the next row appears by itself.
Most dice tools show you what happened. The more useful question is how far that sits from what should have happened, which is why every progress chart carries a dashed reference line. Watching the gap open and close is the whole point — it's variance made visible, and it behaves very differently for a 1-in-6 event than a 1-in-36 one.
It isn't a betting system, and it won't tell you what to do next. Every number here describes rolls that already happened. Dice have no memory: a total that hasn't appeared in eighty rolls is exactly as likely on the next throw as it was on the first.
If a chart sits far below its expected line, that number is not "due". The tool is built to make that idea obvious rather than to feed it — which is also why the language throughout says expected rather than predicted.
A single HTML page with no framework and no build step. Charts are drawn with Chart.js; everything else — the dice, the crosshair readouts, the hot and cold effects — is plain CSS and JavaScript.
Probabilities aren't hard-coded as decimals. They're written as the fractions they come from — 4/36 for hardways, 16/36 for the field — so the reasoning stays visible in the code and the numbers can't quietly drift out of sync with the explanations.
Found a bug, spotted a number that looks wrong, or want a chart the site doesn't have yet? The contact page is the fastest route. Corrections to the maths are especially welcome.