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Roulette house edge

Not surprisingly, casinos have a built-in advantage on their games, and roulette is no exception. This so-called house edge represents the expected long-term profit margin for a casino on a given game. In the game of roulette, the expected win is approximately 5%. This means an average return of $0.95 for every Dollar you wager.

Please note that the house edge is a statistical average. Players’ chances of winning improve as the house edge gets closer to zero.

Inside bets

Roulette players can choose from two betting options: inside bets and outside bets. This table shows the various options with regard to inside bets. The winning chances are based on American roulette.

Betting optionExplanationChance of winning
Straight bet Bet on a single number 2.70%
Split bet, or two-number bet Bet on two adjacent numbers 5.41%
Street bet, or three-number bet Bet on three neighboring numbers 8.11%
Corner bet Bet on four numbers in the form of a square 10.81%
Five bet, or top-line bet (only in American roulette) Bet on five consecutive numbers 13.16%
Six-line bet Bet on two adjoining streets 15.79%


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Outside bets

Please consult the following table for outside bets and their chances of winning.

Betting optionExplanationWinning chances
Any red or black bet Bet on either red or black 48.65%
Any number or high number bet Put your chips on the numbers 1–18, or 19–36 48.65%
Any even or odd bet Place your chips on the even or odd numbers 47.37%
Dozens bet (first 12, second 12, third 12) Put your chips on 1-12, 13-24, or 25-36 32.43%
Column bets Put your chips on one of the columns of twelve numbers 32.43%


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