Josh Miller is the lead casino analyst at CasinoCalcs, and the person who signs off the maths on this site. He has spent more than eight years on online casino mathematics: RTP analysis, house edge, and the payout mechanics that sit behind slots, table games and the odd exotic bet. Before that he was a quantitative betting researcher, where most of the job was checking whether the house edge a game claimed was the house edge it actually had. That’s still more or less what he does here.
What Josh checks
The team builds the calculators and writes the guides, and Josh reviews them. On a calculator he runs the formula against cases worked out by hand, so a £10 each way double or a 35x wagering bonus gives the same answer on paper as it does on screen. On a guide he goes through every figure in the text, from payout tables to the percentages in the worked examples, because a guide that gets one number wrong makes you doubt all the others.
The “Updated” date you see on each page is the last time that page was changed.
If you spot a mistake
The Report an error button under every calculator sends your note straight to the team, and Josh looks at each one. Fixes that changed a number go in the public corrections log, and How we calculate explains the methods behind the tools. For anything else, the contact form reaches him too.
Guides Josh has reviewed
- Ante Post Betting Explained updated 10 Nov 2026
- Blackjack Terms Explained updated 10 Nov 2026
- Chemin de Fer & Punto Banco updated 10 Nov 2026
- Christmas Sweepstakes, Darts and Boxing Day Bets updated 10 Nov 2026
- Each Way Betting Explained updated 10 Nov 2026
- Fixed Odds Betting Terminals updated 10 Nov 2026
- Full Cover Bets Explained updated 10 Nov 2026
- Gambling Maths Formulas updated 10 Nov 2026
- Greyhound Betting Explained updated 10 Nov 2026
- Handicap Betting Explained updated 10 Nov 2026
- How Baccarat Works updated 10 Nov 2026
- How Betting Odds Work updated 10 Nov 2026
- How Bingo Works updated 10 Nov 2026
- How Craps Works updated 10 Nov 2026
- How Fruit Machines Work updated 10 Nov 2026
- How Keno Works updated 10 Nov 2026
- How Many Cards in a Deck? updated 10 Nov 2026
- How Poker Works updated 10 Nov 2026
- How Roulette Works updated 10 Nov 2026
- How Slot Machines Work updated 10 Nov 2026
- How the Lottery Works updated 10 Nov 2026
- How to Bet on Cricket updated 10 Nov 2026
- How to Bet on Football updated 10 Nov 2026
- How to Bet on Horse Racing updated 10 Nov 2026
- How to Bet on Tennis updated 10 Nov 2026
- How to Bet on UFC updated 10 Nov 2026
- How to Deal Poker updated 10 Nov 2026
- How to Play Backgammon updated 10 Nov 2026
- How to Play Blackjack updated 10 Nov 2026
- How to Play EuroMillions updated 10 Nov 2026
- How to Play Lotto updated 10 Nov 2026
- How to Read Horse Racing Form updated 10 Nov 2026
- How to Run a Raffle updated 10 Nov 2026
- How to Run a Sweepstake updated 10 Nov 2026
- Is Online Roulette Rigged? updated 10 Nov 2026
- Lucky Dip vs Choosing Numbers updated 10 Nov 2026
- Poker Terms updated 10 Nov 2026
- Roulette Strategy updated 10 Nov 2026
- Self-Exclusion Explained updated 10 Nov 2026
- Slot Volatility Explained updated 10 Nov 2026
- Starting Price (SP) Explained updated 10 Nov 2026
- Value Betting Explained updated 10 Nov 2026
- What a Lucky 15 Really Pays updated 10 Nov 2026
- What Every Multiple Bet Really Costs updated 10 Nov 2026
- What Is an Accumulator Bet? updated 10 Nov 2026
- What Is Matched Betting? updated 10 Nov 2026