For Engineers · Roulette Edge
Roulette Edge for a Bayesian update
Built for engineers using it for real design work. Go from concept to a running model in the browser, then scale to the cloud when needed. Simulate a Bayesian update live below — adjust the inputs and watch it respond, right in your browser.
Roulette House EdgeLive
the math always wins
Expected value per $10 bet
−$0.53
house edge 5.26% · American (00) wheel
every bet type has the same edge — the wheel is undefeated
Controls
Presets
Roulette payouts are set as if the wheel had no zeros — but it does. That extra 0 (and 00 on American wheels) is where the house edge lives: every bet, from a single number to red/black, carries the same expected loss of 5.26% American or 2.70% European. No betting system changes it, because each spin is independent.
Data Inspector
Win probability47.4%
Payout1 to 1
Expected value$-0.53
House edge5.26%
Governing equation
Reading this result: The extra 00 pocket drives the American-wheel edge to 5.26%: on Red/Black (18) you lose an average of $0.53 per $10 staked, no matter which bet type you pick.
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Frequently asked questions
- Is this good for engineers?
- Yes — this version of "Roulette Edge for a Bayesian update" is framed for engineers using it for real design work. Go from concept to a running model in the browser, then scale to the cloud when needed.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.