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How To Calculate Roulette Betting Odds

To learn how to calculate roulette betting odds, you need to figure how many chances you have of winning versus how many chances you have of losing. For the second number, take the roulette number total and subtract the amount of numbers you're betting on. For instance, if you bet a split or 2-number bet, you'll subtract 2 from the total number from the total number of roulette numbers you're betting on.

To calculate roulette betting odds for double-zero roulette, there are 38 numbers being used. That is 0 and 00 and 1 through 36. So if you are making a split bet on 00-roulette, your odds of winning the bet will be 36-to-2 or 18-to-1. When you win, the casino pays you 17-to-1 odds, which accounts for the house edge.

How you calculate roulette betting odds for single-zero roulette is the same, except there are only 37 numbers being used. That is the 0 and then the 1 through 36. Once again, if you're making a split bet, your odds of winning will be 35-to-2 or 17.5-to-1. Since you'll get paid 17-to-1 odds, the house edge goes down significantly in single-0 roulette.

Double Zero Roulette Odds - Inside Bets

Wager Odds Payout
Straight up bets 37 to 1 35 to 1
Split bets 18 to 1 17 to 1
Street bets, Trio bets 11.66 to 1 11 to 1
Corner bets 8.5 to 1 8 to 1
Basket bets 6.6 to 1 6 to 1
Six line bets 5.33 to 1 5 to 1

Double-Zero Roulette Odds - Outside Bets

Wager Odds Payout
Column bets, Dozen bets 2.167 to 1 2 to 1
Odd or Even bets 1.111 to 1 even money
Red or Black Bets 1.111 to 1 even money
1-18 or 18-36 Bets 1.111 to 1 even money

The probability of winning in an even money bet in American roulette is 47.37%. The house edge will be 5.36%, while the expected payout will be 94.74%.

The expected value on most every bet in roulette would be $-0.0526, usually rounded to $-.0.053. That means for every $100 you bet, you will receive 94.74% in winnings. You might win more. You might lose a whole lot less. But that's your expected return.

One wager in roulette does not return this standard amount. That's the 5-number basket bet. With the basket bet, your expected value is $-0.079. That means you'll only expect back 92.1% or $92.10 on a $100 bet. That's a really bad expected payout and I would recommend you never make the five-number basket bet (0,00,1,2,3).

Single Zero Roulette Odds - Inside Bets

Wager Odds Payout
Straight up bets 36 to 1 35 to 1
Split bets 17.5 to 1 17 to 1
Street bets, Trio bets 11.33 to 1 11 to 1
Corner bets 8.15 to 1 8 to 1
Six line bets 5.17 to 1 5 to 1

Single Zero Roulette Odds - Outside Bets

Wager Odds Payout
Column bets, Dozen bets 2.08 to 1 2 to 1
Odd or Even bets 1.01 to 1 even money
Red or Black Bets 1.01 to 1 even money
1-18 or 18-36 Bets 1.01 to 1 even money

As you can see, the odds of winning at European roulette look a whole lot better. You can win the same amount of money for the same wager, but your chances of winning that bet are better.

If you're playing in Atlantic City or Las Vegas or maybe even Tunica, look for the single-zero roulette wheels. You'll be able to find them in most of the best casinos, if you search long enough. If you have the choice in single-0 or double-0 roulette, always choose single-zero roulette.

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