Free Craps Simulator & Strategy Odds
Roll the dice on a full craps layout with 3-4-5x Free Odds, Place and Buy/Lay bets, Hardways, Crapless Craps mode, and built-in Iron Cross and 3-Point Molly system testers. See the complete craps odds & house edge table.
Click any betting spot (or choose a System Mode above) and press Roll Dice.
- Bankroll
- $1,000
- Active on felt
- $0
- Session net
- $0.00
- Rolls
- 0
- Primary house edge
- 1.41%
Two-Dice Combinatorics: Why 7 Controls Every Bet
Every probability at the craps table comes from the 6 × 6 = 36 equally likely ordered pairs (d1, d2) of two fair six-sided dice. Because 7 can be rolled in 6 ways ((1,6), (2,5), (3,4), (4,3), (5,2), (6,1)), it is the modal outcome (6/36 = 16.67% on any single roll). Once a point p with w(p) ways is established, rolls that neither hit p nor roll a 7 are ignored, so the multi-roll absorption probability of making point p before sevening out is:
P(Hit point p before 7) = w(p) / (w(p) + 6)
| Point Number | Ways out of 36 | Win Prob Before 7 | True Odds Against | Free Odds Payout | Place Bet Payout & Edge |
|---|---|---|---|---|---|
| 4 or 10 | 3 ways each | 3/9 = 33.33% | 2 to 1 | 2 to 1 (0.00% edge) | 9 to 5 (6.67% edge) |
| 5 or 9 | 4 ways each | 4/10 = 40.00% | 3 to 2 | 3 to 2 (0.00% edge) | 7 to 5 (4.00% edge) |
| 6 or 8 | 5 ways each | 5/11 = 45.45% | 6 to 5 | 6 to 5 (0.00% edge) | 7 to 6 (1.52% edge) |
| 2 or 12 (Crapless) | 1 way each | 1/7 = 14.29% | 6 to 1 | 6 to 1 (0.00% edge) | 11 to 2 (7.14% edge) |
| 3 or 11 (Crapless) | 2 ways each | 2/8 = 25.00% | 3 to 1 | 3 to 1 (0.00% edge) | 11 to 4 (6.25% edge) |
Standard Craps vs. Crapless Craps (1.41% vs. 5.38%)
Casinos market Crapless Craps (also called Never Ever Craps) with the pitch that you can never lose your Pass Line bet on the come-out roll: rolling 2, 3, or 12 simply establishes that number as your point. What the sign does not mention is that 11 also stops being an automatic come-out winner, and that every come-out 2, 3, 11, or 12 locks your flat Pass Line bet into a point where the dealer is a 3-to-1 or 6-to-1 favorite to roll a 7 first—while still paying only 1-to-1 if you hit it:
EV(Crapless Pass) = (6/36)(+1) + Σ (w(p)/36) × ((w(p) − 6)/(w(p) + 6)) = −373/6930 ≈ −5.38%
Switching on the Crapless Craps checkbox in the simulator above nearly quadruples the Pass Line house edge from 1.41% to 5.38%.
Craps Systems Compared: 3-Point Molly vs. Iron Cross
Use the System mode dropdown in the simulator to test the two most famous craps strategies side by side:
- 3-Point Molly (Pass Line + up to 2 Come Bets, each with 3-4-5x Free Odds): Starts with a Pass Line bet, backs the point with maximum 3-4-5x Free Odds (3× on 4/10, 4× on 5/9, 5× on 6/8), and places Come bets with 3-4-5x Free Odds until three numbers are working. Because every dollar of Free Odds carries a 0.00% house edge, the combined house edge across all money on the layout drops from 1.41% to 0.37%.
- Iron Cross ($10 Field + $10 Place 5 + $12 Place 6 + $12 Place 8): Covers every number except 7 by combining Place 5 ($10), Place 6 ($12), Place 8 ($12), and the one-roll Field ($10, which covers 2, 3, 4, 9, 10, 11, 12). Players love the Iron Cross because 30 out of 36 rolls produce a cash payout. However, on 5, 6, and 8 (14 of those 30 winning rolls), the $14 Place win is partially eaten by the $10 Field loss (netting only +$4), and the 6 ways to roll a 7 wipe out all $44 at once:
EV(Iron Cross per roll) = (14×(+$4) + 14×(+$10) + 2×(+$20) − 6×($44)) / 36 = −$28/36 ≈ −$0.78 per roll. Because the Field bet (5.56% edge) resolves on every single roll, the Iron Cross bleeds nearly six times more expected value per roll than a Pass Line bet with Free Odds.
Human Shooters (“Dice Control”) vs. Automated Bubble Craps
Two physical debates come up at every live craps pit:
- Can “Dice Setters” Control the Throw? Advantage-play authors have long promoted setting the dice on specific axes (such as the “Hardway Set” or “3-V Set”) and tossing them with a low-arc backspin to reduce 7s. To defeat controlled throws, casinos enforce two strict physical rules: both dice must travel to the far end of the 12-to-14-foot tub and strike the pyramid-studded rubber backwall (“alligator skin”), and the stickperson calls “no-roll” if a die slides without tumbling. High-speed camera and physics experiments confirm that striking the angled rubber pyramids introduces chaotic angular deflection that scrambles the dice back to 1/36 uniformity.
- Why Casinos Install Electronic Bubble Craps: Electronic bubble craps replaces the boxperson, base dealers, and stickperson with a dome housing two oversized dice on a vibrating mechanical diaphragm and optical recognition cameras. While the mechanical popper produces fair 1/36 outcomes, electronic bubble craps terminals often cap Free Odds at 2x (raising the combined Pass+Odds edge from 0.37% to 0.61%) and run at a much faster roll pace than a full crewed table.
Compare every wager on the felt in our complete Craps Odds, Payouts & House Edge table.
Frequently asked questions
- What are the best bets on a craps table?
- Pass Line (1.41% house edge) and Come (1.41%), or Don’t Pass and Don’t Come (1.36% house edge), backed by the maximum Free Odds the table allows. Free Odds pay exact true odds (2:1 on 4/10, 3:2 on 5/9, 6:5 on 6/8) with a 0.00% house edge—dropping your combined house edge to 0.37% under 3-4-5x odds. Place 6 and Place 8 (1.52%) are the only other bets below 2%.
- Why is Crapless Craps so much worse for the Pass Line player?
- In standard craps, a come-out roll wins on 7 or 11 (8 ways out of 36) and loses on 2, 3, or 12 (4 ways), giving the player a 2-to-1 edge on the come-out roll that offsets the disadvantage during the point phase. Crapless Craps eliminates come-out losses on 2, 3, and 12, but it also eliminates the come-out win on 11 and forces you to roll 2, 3, 11, or 12 again before a 7 for a 1:1 payout—jumping the Pass Line house edge from 1.41% to 5.38%.
- Does the Iron Cross system beat craps because it wins on every number except 7?
- No. With Place 5 ($10), Place 6 ($12), Place 8 ($12), and Field ($10) working ($44 total), you win on 30 of the 36 two-dice combinations (+$4 on 5/6/8, +$10 on 3/4/9/10/11, +$20 on 2/12). However, the 6 ways to roll a 7 wipe out all four bets at once (−$44), leaving an exact expected value of −$28/36 = −$0.78 on every single roll.
- Can human shooters use dice setting or controlled throws to change craps probabilities?
- No controlled-throw advantage has ever survived independent verification under regulation casino conditions. Casinos require both dice to fly the length of a 12-to-14-foot table and strike the pyramid-studded rubber backwall (“alligator skin”), which Chaotic dynamics shows randomizes rotational velocity whenever a die hits an angled pyramid point.
- Are electronic Bubble Craps machines fair?
- Electronic bubble craps machines use physical dice bounced by a mechanical popper inside a sealed acrylic dome, read by optical cameras. While the dice rolls themselves are 1/36 per ordered pair, electronic bubble craps machines often cap Free Odds at 2x instead of 3-4-5x and resolve 90 to 120 rolls per hour—multiplying your expected hourly loss compared with a live crew table.