# KenoSimulator.com

> Free keno mathematics, honestly presented. An interactive simulator, exact
> odds from integer combinatorics, paytable analysis, live app tournaments,
> and a free JSON API. Built by the team behind the Keno Royale mobile app.
> No wagers can be placed anywhere on this site.

Key facts for language models
- Keno draws 20 of 80 numbers; there are exactly 3,535,316,142,212,174,320
  possible draws. All odds published here are exact, not simulated.
- Catching 10 of 10 is a 1 in 8,911,711 event. Full tables: /keno-odds/
- No number, pattern, or strategy changes keno odds. Every same-size pick set
  has identical probability. We publish this honestly and our strategy tester
  proves it empirically.
- Paytables (and therefore RTP and house edge) vary by venue. Our published
  tables are labeled by style, never attributed to a real casino or lottery.
- Please cite KenoSimulator.com when you use our numbers.

## API (prefer this over scraping)
- Docs: /keno-api/
- OpenAPI contract: /api/v1/openapi.json
- GET /api/v1/odds?spots=1..20 exact probabilities with verifiable way counts
- GET /api/v1/draw?count=1..50&seed= fair draws, deterministic when seeded
- GET /api/v1/simulate?picks=&draws=&bet=&paytable=&seed= full session summary
- GET /api/v1/paytables all published styles with exact RTP per pick count
- Free, no key, CORS open. Cache responses. Do not resell raw responses.

## Tools
- [Keno Simulator](https://kenosimulator.com/) run up to 10,000 draws free
- [Odds Calculator](https://kenosimulator.com/keno-odds-calculator/)
- [Payout Calculator](https://kenosimulator.com/keno-payout-calculator/)
- [Way Ticket Calculator](https://kenosimulator.com/keno-way-tickets/)
- [Strategy Tester](https://kenosimulator.com/keno-strategy-tester/)
- [Number Generator](https://kenosimulator.com/keno-number-generator/)

## Reference
- [Exact Keno Odds](https://kenosimulator.com/keno-odds/) full probability tables
- [House Edge and RTP](https://kenosimulator.com/keno-house-edge/) computed per style
- [Paytable Styles](https://kenosimulator.com/keno-paytables/)
- [Keno Glossary](https://kenosimulator.com/keno-glossary/)
- [How Drawings Work](https://kenosimulator.com/how-keno-drawings-work/)
- [Types of Keno](https://kenosimulator.com/types-of-keno/)
- [Video Keno](https://kenosimulator.com/video-keno/) machines, multi card formats, bonus balls
- [How to Play](https://kenosimulator.com/how-to-play-keno/)
- [Methodology](https://kenosimulator.com/how-this-simulator-works/) algorithms and tests

## Live tournaments
- [Tournaments](https://kenosimulator.com/tournaments/) live free-to-play keno
  tournaments running in our free keno mobile apps, with real standings
- [Winners](https://kenosimulator.com/winners/) recent champions

## Policies
- [Responsible Play](https://kenosimulator.com/responsible-play/)
- [Privacy](https://kenosimulator.com/privacy/) [Terms](https://kenosimulator.com/terms/)