Home
Back
Roulette Probability Formula:
| From: | To: |
Roulette wheel probability refers to the mathematical likelihood of a specific outcome occurring on a roulette wheel. The probability depends on the number of possible outcomes, which varies between American and European roulette wheels.
The calculator uses the basic probability formula:
Where:
Explanation: The probability of any single number winning is simply 1 divided by the total number of possible outcomes.
Details: American roulette has 38 pockets (numbers 1-36, 0, and 00), while European roulette has 37 pockets (numbers 1-36 and a single 0). This difference affects the house edge and player probabilities.
Tips: Simply select the type of roulette wheel (American or European) and click calculate to see the probability of a single number winning.
Q1: Why does American roulette have worse odds?
A: The additional double zero (00) in American roulette increases the total number of outcomes to 38, reducing the probability of any single number winning compared to European roulette's 37 outcomes.
Q2: What's the house edge in each version?
A: European roulette has a house edge of 2.7%, while American roulette has a higher house edge of 5.26% due to the extra pocket.
Q3: Are there other betting options with different probabilities?
A: Yes, players can bet on red/black, odd/even, dozens, columns, and other combinations, each with different probabilities and payouts.
Q4: Does this calculator work for other casino games?
A: No, this calculator is specifically designed for roulette probabilities. Other casino games like blackjack, craps, or slot machines have different probability calculations.
Q5: Is this probability the same in online roulette?
A: Yes, the mathematical probabilities remain the same whether playing physical roulette or online versions, assuming the game uses a standard wheel configuration.