Roulette Probability Calculator
| Bet | Win prob. | Payout | EV per stake | House edge |
|---|
European wheel has 2.70% house edge on all bets except "5-number" bet (US only, 7.89%). American wheel: 5.26% on most bets due to the extra 00 pocket.
About this tool
Roulette Probability Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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