Understand roulette probability

Roulette Odds Calculator

Learn roulette odds, payouts, bet coverage, and probability differences between American and European roulette in a clear simulator-focused guide. Use the interactive calculator below to compare roulette probability, payout, expected value, and house edge across American and European wheels.

Practice in simulator
Bet coveragePayout examplesAmerican vs European oddsBeginner-friendly explanations
Odds StationJunko Bodie Roulette Calculator38 pockets · Straight · 35:1
Live wheel modelAmerican roulette
Loading wheel...
Wheel pockets38
Winning pockets1
Calculator table

Select a roulette bet and read the odds

Pick a wheel, set a practice stake, then choose the bet type exactly like a simulator decision station. Results update immediately without spinning or logging in.

Use any non-negative amount to model a simulator stake.

Inside bets
Outside bets
American special
American roulette

Straight odds board

35:1
Win 2.63%Lose 97.37%
Winning pockets1 / 38
Profit if won$350.00
Total returned$360.00
Expected value-$0.53per spin
Expected loss$0.5325,000-spin average*
House edge5.26%

Straight covers 1 of 38 pockets on American roulette. It pays 35:1 when it wins, so a $10.00 practice stake would return $360.00 including the original stake. The long-run expected loss is 5.26% of the amount placed. This is probability education only and does not predict the next spin.

Long-run average uses a 25,000-spin reference sample for disclosure. Actual simulator results can vary and do not predict future spins.

American vs European

Compare the selected bet across wheel modes

WheelPocketsWin probabilityHouse edgeExpected value
American roulette382.63%5.26%-$0.53
European roulette372.70%2.70%-$0.27

Junko Bodie Roulette is simulator access only. The calculator explains probability and payout math for practice; it does not offer real-money wagering or guaranteed outcomes.

Inside bet

Straight

A straight bet covers one number and pays 35:1 when that exact pocket hits.

Coverage
1 pockets
Payout
35:1
Inside bet

Split

A split covers two neighboring numbers on the table and pays 17:1.

Coverage
2 pockets
Payout
17:1
Inside bet

Street

A street covers three numbers in one row and pays 11:1.

Coverage
3 pockets
Payout
11:1
Inside bet

Corner

A corner covers four numbers that meet at one point on the table and pays 8:1.

Coverage
4 pockets
Payout
8:1
Inside bet

Six Line

A six line covers two adjacent rows for six total numbers and pays 5:1.

Coverage
6 pockets
Payout
5:1
Outside bet

Dozen

A dozen covers one group of twelve numbers and pays 2:1.

Coverage
12 pockets
Payout
2:1
Outside bet

Column

A column covers twelve numbers in one table column and pays 2:1.

Coverage
12 pockets
Payout
2:1
Outside bet

Red / Black

Red/black covers eighteen colored number pockets and pays 1:1.

Coverage
18 pockets
Payout
1:1
Outside bet

Odd / Even

Odd/even covers eighteen number pockets and pays 1:1.

Coverage
18 pockets
Payout
1:1
Outside bet

Low / High

Low/high covers eighteen number pockets and pays 1:1.

Coverage
18 pockets
Payout
1:1
American special

Five Number

The American five-number bet covers 0, 00, 1, 2, and 3 and pays 6:1.

Coverage
5 pockets
Payout
6:1
Calculator coverage

What the roulette odds calculator covers

Use this public simulator-style tool to compare standard roulette bet coverage, American and European wheel math, payout ratios, expected value, and house edge.

American wheel
38 pockets, including 0 and 00
European wheel
37 pockets, including single 0
Bet types
Inside, outside, and American five-number bets
How to read roulette odds

Probability, payout, and expected value

Roulette odds are easiest to understand when coverage, payout, and wheel type are shown together. These guides explain the same math used in the calculator.

Understand what each bet covers

Roulette odds begin with coverage. A straight bet covers one number, while outside bets cover larger groups such as red, black, odd, even, low, or high.

Compare payout and probability

Higher payouts usually come with lower hit frequency. Lower payouts usually cover more numbers. The simulator helps make that tradeoff visible.

Use odds as context

Odds explain probability and payout structure. They do not predict a future spin or guarantee a result.

FAQ

Roulette odds calculator questions

What is the payout for a straight roulette bet?

A standard straight bet pays 35 to 1 when it wins, plus the returned stake in typical payout accounting.

Why are American and European odds different?

American roulette has 38 pockets because it includes 0 and 00. European roulette has 37 pockets because it includes only one zero.

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Unlimited practice chips
Built by Roulette Author Junko Bodie
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21+ ONLY

PLAY-MONEY SIMULATOR. Intended for an adult audience (21+). Does not offer real money gambling. No real money or prizes can be won.