We aggregate live progressive-jackpot data from operator APIs and public tracking sites, normalize it into a single dataset, and score every jackpot for value, momentum, and hit probability. This page explains where every number comes from and how the math is done — no black boxes.
Last updated: 2026-04-09
We pull from five independent sources and reconcile them:
Where two sources disagree, we prefer the official operator API (Games Global, IGT) over scrapers. Each jackpot row in our database stores its source so you can audit any number on the site.
Live values update every 6 hours via our scheduled scraper pipeline. The Games Global and IGT APIs are polled more frequently when a jackpot is near its average hit value. The "Last refresh" timestamp on every page reflects the actual time the underlying source was queried — not when the page was built.
Operator feeds report in their native currency (GBP, USD, EUR, NOK). We store the original value and convert to EUR using daily mid-market rates from frankfurter.app. The currency toggle in the header re-renders all values from the stored EUR figure using the same rate table.
FX rates are not real-time. For very small jackpots (<€1,000) the rounding error can be a few percent. For pots that matter (>€100k) the conversion is accurate to within ~0.5%.
The heat score is a single number summarizing how "due" a jackpot is. It blends three signals:
The three components are weighted 50/30/20 and clipped to 0–100. Heat is a heuristic, not a prediction — it tells you which jackpots are statistically interesting today, not which one will hit next.
For jackpots with at least 10 recorded historical hits we fit a simple survival model on the gap-between-hits distribution. The forecast is conditional on time elapsed since the last hit: "given that this jackpot has gone N days without hitting, what's the probability it hits in the next 7 / 30 / 90 / 180 days?"
This is a frequentist estimate from observed cycle lengths. It does not account for jackpot type, RTP changes, or operator-side reseeds. Treat it as guidance, not gospel.
The EV calculator on each jackpot page asks: "if you play right now, what's the effective RTP after factoring in the inflated jackpot pool?" We start from the base game RTP (from our slot.report integration), add the contribution of the current jackpot above its seed value, and report the result as a percentage.
A positive-EV jackpot is one where the current pot is large enough that the long-run return per spin exceeds 100%. These are rare and short-lived — by the time most players notice, the pot has either hit or sharks have already absorbed the edge.
The same physical jackpot often appears in multiple sources (e.g. Mega Moolah Mega is listed by Games Global, JackpotGraphs, and CasinoListings simultaneously). We tag each row by source prefix (jg-, gg-, cl-, lcb-) and union them in the UI by name + tier. Win histories are merged across sources so a single page shows every recorded hit regardless of which feed reported it.
standalone. The displayed value is the single largest pool we observed across operators, not the sum.If a number on this site looks off, please tell us. Every figure is traceable to a source row in our database and we can usually fix bad data within a day. Contact details are on the disclosure page.
18+ only. JackpotScout publishes data for informational purposes. Gambling involves risk. Please play responsibly.