Roulette
Roulette odds calculator
Choose a wheel and a bet to calculate win probability, net profit and expected value. The calculator uses standard payouts and fair, independent spins.
Your result
48.65%
Chance of winning this bet
- Net profit if it wins
- $10.00
- Total return if it wins
- $20.00
- Expected net per spin
- −$0.2703
- House edge
- 2.70%
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Hypothetical stakes. Standard payouts only. A calculation does not predict the next spin.
Read the single-bet result
The displayed net win excludes your returned stake. Total return includes it. A $10 red bet at 1:1 produces $10 net profit and a $20 total return if it wins. Expected value combines both winning and losing outcomes.
Calculate multiple bets together
When bets overlap, count every wheel pocket once and settle every selected wager on that outcome. A pocket can win one bet and lose another. Probability of any winning ticket is not necessarily probability of an overall profit.
Calculate a sequence of spins
Use a fixed event such as red or one chosen number and a number of future spins. All, none and at least once describe that event across the specified block. They do not calculate a run anywhere within a longer session.
What the calculator includes
Standard single-, double- and triple-zero wheels are supported. La Partage, En Prison, multiplier games, side bets and nonstandard paytables are excluded. This is a math tool with no wagering or spin prediction.