Craps Simulator
Roll two dice, place a pass line or don't pass bet, and play out the come-out roll and point phase exactly as it works at a real table. Run a single roll or thousands at once to see how your realized results compare to the true house edge. Also test the roulette simulator or the baccarat simulator.
Bankroll
$1000
Resolved bets
0
Realized edge
—
Theoretical edge
1.41%
Why the house always wins
A pass line bet wins outright on a come-out roll of 7 or 11, loses on 2, 3, or 12, and otherwise sets a point that must repeat before a 7 to win. Working through every combination of the dice, pass line wins 244 times out of 495 possible resolutions — a 1.41% house edge. Don't pass flips most of that around but pushes on a come-out 12 instead of losing, landing at a slightly lower 1.36%.
Odds bets — the additional wager you can make once a point is set — pay true mathematical odds with 0% house edge on their own: 2:1 on points 4 or 10, 3:2 on 5 or 9, 6:5 on 6 or 8. That makes odds the lowest-edge addition available at the table, but it rides on top of a pass or don't-pass bet that already carries its own edge — adding odds dilutes your combined edge toward 0%, it never makes the overall bet a winning one.
Payout table
| Bet | Payout |
|---|---|
| Pass line / Don't pass | 1:1 |
| Odds on 4 or 10 | 2:1 |
| Odds on 5 or 9 | 3:2 |
| Odds on 6 or 8 | 6:5 |
Frequently asked questions
Is this craps simulator free?
Yes. It runs entirely in your browser, requires no signup or download, and does not use real money.
What's the house edge on pass line vs don't pass?
Pass line carries a 1.41% house edge (7/495). Don’t pass carries 1.36% (27/1980) — slightly lower because of the bar-12 rule, where a come-out roll of 12 pushes (your bet is returned) instead of losing.
Do odds bets really have no house edge?
On their own, yes — odds bets pay true mathematical odds with 0% house edge. But an odds bet only exists on top of a pass or don’t-pass bet, which already carries its own edge. Adding odds dilutes the combined edge toward 0%, it does not cancel it or turn the overall bet positive. There is no combination of craps bets with positive expected value.
Can I test Martingale or other staking systems here?
Run repeated rolls and track your bankroll to see for yourself. Every roll is independent and the house edge is fixed regardless of bet sizing — see the dedicated breakdown on our Martingale roulette simulator for why staking systems don’t change the long-run math.
Does this simulator use real money?
No. This is a free educational tool and does not facilitate real-money wagering.