About The Casino Sim
An educational platform dedicated to demystifying casino game mathematics through transparent simulation
A Note from the Creator
I built this simulator to satisfy my own intellectual curiosity. I wanted to see if I could figure out the mathematics behind simulating slot machine results. Returning a specific RTP was the straightforward part – the real challenge was accurately simulating the volatility and win frequency patterns that define modern slot machines. I think I've done a pretty good job, but it's still a work in progress. I'm always looking to improve and welcome your feedback.
As a frequent Vegas traveler, I wanted to build a tool that I could use to test various bankroll levels and betting strategies to maximize my enjoyment at the casino. I'm under no illusion that I'll do anything but lose at slots and video poker in the long run – the math doesn't lie. For me, like many others, the challenge isn't about beating the house; it's about maximizing entertainment value within a budget.
What happens if I play shorter sessions on higher volatility machines? What if I lower my bet and play low volatility machines for longer sessions? How does my bankroll survive different RTP settings? The simulator lets me explore these scenarios and understand the mathematics without risking real money.
Our Mission
Educate Through Transparency
Provide clear, accurate information about how casino games really work, including RTPs, volatility, and the mathematics that ensures the house edge.
Demystify the Mathematics
Break down complex probability and statistics into understandable concepts that help players make informed decisions about their gambling.
True Random Simulation
Implement genuine random number generation without any "correction" algorithms, showing how real RTPs emerge from probability distributions.
Promote Responsible Play
Help players understand the true costs of gambling and provide tools to explore strategies without financial risk.
Why This Matters
Most people don't understand the mathematics behind casino games. They might know "the house always wins" but not why or how. This simulator shows exactly how RTPs work, how variance affects your bankroll, and why that big win feels so close but rarely comes. Knowledge is power, and understanding these mechanics helps make better decisions about if, when, and how to gamble.
Our Methodology
True Random Number Generation
Our simulator uses cryptographically secure random number generation to ensure every spin is completely independent. There's no tracking of previous results, no "hot" or "cold" machines, and no adjustment algorithms to force outcomes toward the theoretical RTP.
// Our approach: True randomness
Each spin uses crypto.getRandomValues() for genuine randomness
Probability distributions determine outcomes naturally
RTP emerges from mathematics, not forced corrections
Every spin is independent with no memory of previous results
Mathematical Accuracy
Every probability distribution is carefully calculated to match real slot machine mathematics. Our variance calculations, standard deviations, and confidence intervals are based on established statistical formulas.
24 RTP Tables
8 RTPs × 3 volatility levels
Validated Distributions
Each sums to exact RTP ±0.1%
Real Casino Data
Based on actual game sheets
Volatility Simulation
The hardest part wasn't making slots return the right RTP – it was accurately simulating volatility. Real slots don't just differ in how much they pay back, but in how they pay it back. Our simulator models this through carefully crafted probability distributions that create authentic low, medium, and high volatility experiences. You'll see the same feast-or-famine patterns, the same near-miss psychology, and the same bankroll swings you'd experience in a real casino.
No Hidden Manipulation
No "Due" Wins
The simulator never forces a win because you've been losing
No Session Tracking
Your 1000th spin has the same odds as your 1st
No RTP Correction
Results can deviate significantly from theoretical RTP in short sessions
Responsible Gambling
Important Reminder
This simulator is for education and entertainment only. It demonstrates that all casino games have a negative expected value for players. The house edge is real, mathematical, and insurmountable in the long run. Never gamble with money you can't afford to lose.
Warning Signs
- ⚠Gambling with money meant for essentials
- ⚠Chasing losses with bigger bets
- ⚠Lying about gambling activities
- ⚠Feeling anxious when not gambling
- ⚠Borrowing money to gamble
Healthy Approach
- ✓Set a loss limit before playing
- ✓View gambling as paid entertainment
- ✓Never gamble when upset or drunk
- ✓Take regular breaks during sessions
- ✓Accept losses as the cost of entertainment
Get Help
If gambling is causing problems in your life, help is available:
National Problem Gambling Helpline
24/7 Support
1-800-522-4700
Gamblers Anonymous
Find meetings and support
BeGambleAware
UK support and resources
Technical Details
Built With
- Next.js 14 - React framework
- TypeScript - Type safety
- Zustand - State management
- Recharts - Data visualization
- Tailwind CSS - Styling
Open Source
The Casino Sim is built with transparency in mind. While the current code is proprietary, I'm considering open-sourcing parts of the simulation engine to help others understand casino game mathematics.
Get in Touch
Feedback & Questions
Have suggestions for improving the simulator? Found a bug? Want to share your experience? I'd love to hear from you.
contact@thecasinosim.comReady to Explore?
Test your strategies, understand the mathematics, and see how casino games really work – all without risking a penny.