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Craps Dice Probability Glossary

Essential terminology for understanding throws, betting odds, and table etiquette in the game of craps

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Understanding Craps Terminology

Core Craps Concepts

Craps is a dice game with its own specialized vocabulary. Understanding these terms is essential for both new and experienced players looking to comprehend the game's mechanics and probability theory.

Come-Out Roll
The first roll of a new round in craps. The come-out roll determines whether a point will be established or if the round will end immediately. Rolling 7 or 11 results in an immediate win for pass line bettors, while rolling 2, 3, or 12 results in a loss (called "craps").
Point
A number established on the come-out roll (4, 5, 6, 8, 9, or 10). Once a point is established, the shooter continues rolling until either the point number appears again (resulting in a pass) or a 7 is rolled (called "sevening out" or a loss for pass line bettors).
Natural
Rolling a 7 or 11 on the come-out roll. This is an immediate win for pass line bettors. The probability of rolling a natural on any single roll is 8 out of 36 possible combinations, or approximately 22.2%.
Snake Eyes
Rolling two ones, totaling 2. This is called "craps" and results in an immediate loss for pass line bettors on the come-out roll. It is the lowest possible total and one of the most feared outcomes on the opening roll.
Probability Distribution
With two standard six-sided dice, there are 36 possible combinations. The number 7 can be rolled in 6 ways (1-6, 2-5, 3-4, 4-3, 5-2, 6-1), making it the most likely total. Understanding these distributions is crucial for evaluating odds on various craps bets.
Responsible Betting
All craps bets carry specific house advantages. Pass line bets have approximately 1.4% house edge, while other bets vary. Knowledge of true odds versus payout odds helps players make informed decisions about which bets offer better mathematical value.

Betting Odds and Probability

Craps offers numerous betting opportunities, each with distinct probability calculations. The true odds represent the actual probability of an outcome, while casino payouts reflect the house's mathematical advantage.

Pass Line Bet: One of the most popular craps bets, the pass line wager wins on come-out rolls of 7 or 11, loses on 2, 3, or 12, and wins if the point is repeated before a 7 is rolled. The house edge on this bet is approximately 1.4%.

Don't Pass Bet: The opposite of pass line betting. This bet loses on come-out rolls of 7 or 11, wins on 2 or 3, and wins if a 7 is rolled before the point. The probability is nearly inverse to pass line betting, though the house edge remains similar at approximately 1.4%.

Odds Bets: After a point is established, players can make an additional "odds" bet that is paid at true odds. These bets have zero house advantage, making them mathematically favorable compared to other casino wagers.

Come and Don't Come: These bets follow the same logic as pass line and don't pass bets but can be made after the point is established. They create new sequences of rolls independent of the main pass line action.

Understanding probability distributions helps players recognize that while short-term variance is inevitable, certain bets maintain superior long-term mathematical expectations compared to others available on the craps table.

Table Etiquette and Terminology

The Shooter: The player who throws the dice. In craps, one player at a time acts as the shooter, and the dice pass around the table after each round.

Craps Out: When the shooter rolls 2, 3, or 12 on the come-out roll, ending the round with losses for pass line bettors.

Seven Out: When a 7 is rolled after a point has been established, ending the shooter's turn. This is called "sevening out" and results in don't pass bets winning while pass line bets lose.

Box Cars: Rolling two sixes, totaling 12. Like snake eyes, this results in craps on the come-out roll.

Hard Way: Rolling doubles (such as 4-4 for a hard eight) creates higher payouts for specific bets but lower probability outcomes. These bets appeal to players seeking larger returns despite lower probability of success.

Proper craps table etiquette includes respecting the shooter, placing bets clearly and promptly, avoiding touching the dice, and refraining from negative comments when outcomes don't favor you. The social aspect of craps makes understanding shared terminology and respectful behavior essential for an enjoyable experience.

Key Takeaways
Craps probability calculations depend on understanding the 36 possible combinations from two six-sided dice and how each number's frequency affects betting odds.
The seven is the most probable roll with 6 combinations. Understanding this distribution helps evaluate which bets offer the best mathematical expectations.
Odds bets provide true probability payouts with zero house advantage, making them superior choices compared to standard proposition bets.
Responsible gaming means understanding house edges, managing bankroll appropriately, and recognizing that all casino games operate with a mathematical advantage favoring the house.

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