Roulette Payout
Calculate roulette payouts, win probability, odds, and expected return for European and American roulette. Free online roulette odds calculator with payout charts and house edge analysis.
About This Calculator
The Roulette Payout Calculator helps casino players and gambling enthusiasts calculate the exact payout, win probability, odds, and expected return for any roulette bet. Whether you play European roulette (single zero, 37 slots) or American roulette (double zero, 38 slots), this tool provides instant calculations for all bet types including straight, split, street, corner, double street, column, dozen, and outside bets like red/black, even/odd, and low/high.
The calculator uses the standard roulette payout formula: Payout = 36 / S - 1, where S is the number of spaces your bet covers. Win probability is calculated as favorable outcomes divided by total slots (favorable/37 for European, favorable/38 for American). Expected value and house edge are derived from the probability-weighted average of all possible outcomes. The house edge is 2.70% for European roulette and 5.26% for American roulette, with the difference caused entirely by the extra 00 slot in the American version.
Regional Notes
Global: Roulette rules are standardized worldwide with European and American variants. Most casinos outside North America offer European roulette with its lower 2.70% house edge. American roulette with the additional 00 slot is standard in the United States, Canada, South America, and the Caribbean. United Kingdom and European casinos predominantly offer European roulette. Some casinos also offer French roulette with additional rules like La Partage and En Prison that further reduce the house edge on even-money bets.
Frequently Asked Questions
How do I calculate roulette payout?
Roulette payout is calculated using the formula: Payout Ratio = 36 / S - 1, where S is the number of spaces your bet covers. For a straight bet on a single number, S = 1 giving a 35:1 payout. Multiply your bet amount by the payout ratio to get your net profit.
What is the difference between European and American roulette?
European roulette has 37 slots (numbers 1-36 and a single 0). American roulette has 38 slots (numbers 1-36, 0, and 00). The extra 00 slot in American roulette increases the house edge from 2.70% to 5.26%, making European roulette more favorable for players.
Which roulette bet has the best odds?
Outside bets like Red/Black, Even/Odd, and Low/High (1-18/19-36) have the highest probability of winning at 48.65% in European roulette and 47.37% in American roulette. However, they pay only 1:1. Straight bets have the lowest probability (2.70% European, 2.63% American) but pay 35:1.
What is the house edge in roulette?
The house edge is 2.70% for European roulette (single zero) and 5.26% for American roulette (double zero). This means for every $100 wagered, you can expect to lose $2.70 on European and $5.26 on American roulette on average over the long term.
What does 35 to 1 payout mean in roulette?
A 35:1 payout means for every unit you bet, you win 35 units in profit if your bet wins. For example, a $10 straight bet that wins returns your $10 stake plus $350 profit for a total of $360. This is the payout for straight (single number) bets.
How is expected value calculated in roulette?
Expected value = (Probability of winning x Net Profit) - (Probability of losing x Bet Amount). For a $10 straight bet on European roulette: EV = (1/37 x $350) - (36/37 x $10) = -$0.27. The negative expected value confirms the casino's mathematical advantage.
What is the best roulette strategy?
No betting strategy can overcome the house edge in roulette since each spin is independent. The Martingale system (doubling after losses) and other progression systems can manage bankroll but do not change the underlying odds. Playing European roulette (2.70% house edge) is mathematically better than American roulette (5.26% house edge).
What are the odds of hitting a specific number in roulette?
The odds of hitting a specific single number are 1 in 37 (2.70%) in European roulette and 1 in 38 (2.63%) in American roulette. The payout is 35:1 regardless of which roulette variant you play.