Use these free CrapsPit tools to practise a complete round, examine dice probabilities, verify a payoff and compare the long-run cost of common wagers. They use virtual amounts and explain the mathematics without promising a winning system.
What do you want to find out?
“What should my $18 Place 6 pay?”
Open a ready-to-check example and change the amount or table rules.
Check this payout“What if the next roll is 7?”
Inspect the $135 Across example with point 5, then compare the smaller layout.
Inspect the starting layout“What happens in one round?”
Follow the puck and one Pass Line wager with step-by-step coaching.
Start the first lessonInteractive craps tools
Choose what you want to check
Start with the table coach if you are learning the sequence. Use the calculators when you want to inspect a specific probability, payout or house edge.
Practice the round
Free Craps Table Coach
Place virtual wagers, follow the puck and see how each roll changes the table. Optional coaching explains decisions while you play.
- Normal play and guided lessons
- Accessible animated dice
- Roll and payout ledger
Explore probability
Craps Probability Explorer
See how often every dice total appears, compare a selected number with 7 and examine the expected rolls before resolution.
- All 11 dice totals
- Number-before-7 races
- Common-bet comparison
Verify the payoff
Craps Payout Auditor
Check net profit, returned stake, total returned, commissions and the wager multiples that produce clean casino payouts.
- Standard payout verification
- Buy and Lay commissions
- Correct wager multiples
Compare the cost
Craps Bet Calculator
Compare standard payouts, house edge and modeled expected loss for common bets at the wager amount you choose.
- House-edge comparison
- Expected-loss modeling
- Clear payout guidance
Map the exposure
Craps Bet Builder & Exposure Map
Assemble simultaneous wagers, set the puck and inspect immediate cash flow for every possible next total.
- Up to 12 wager rows
- Totals 2–12 exposure map
- Per-roll and per-decision expectation
Use one wager across three tools
Take an $18 Place 6 through the Payout Auditor first. It is a clean multiple of $6 and wins $21 profit under the standard 7-to-6 paytable. If the bet stays up, the $18 remains on the layout after that profit is paid. The auditor answers the settlement question; it does not say how often 6 beats 7.
Next, use the Probability Explorer. Five dice combinations make 6 and six make 7, so 6 wins 5/11, or about 45.45%, of decisions that end this number-versus-7 race. The other 25 combinations neither win nor lose the Place bet on that roll. This is why the 7-to-6 payout can sound attractive while still leaving a house edge.
Finally, put the wager in the Bet Builder. The next 6 shows +$21 immediate profit with $18 continuing to work; the next 7 shows −$18; every other total shows no immediate change to this wager. The per-roll expected result is [(5 × $21) − (6 × $18)] ÷ 36, or about −$0.083. Use the Auditor for settlement, the Explorer for event probability, and the Builder for the complete next-roll state.
Compare the $135 and $64 layouts on the same roll
Open the $135 Across example above with point 5. Its five Place bets are $25 on 4, 9 and 10, plus $30 on 6 and 8; the point 5 is omitted. All $135 is working, so a 7 on the next roll loses $135. To model the smaller $64 Across layout, change the amounts to $10 each on 4, 5, 9 and 10 and $12 each on 6 and 8. Add the sixth row for 5 and keep the point at 5.
The smaller layout still loses $64 to a 7 while working. Under standard Place payouts, its next-roll expected result is [(3 × $18 × 2) + (4 × $14 × 2) + (5 × $14 × 2) − (6 × $64)] ÷ 36 = about −$0.67. The $135 layout averages about −$1.39 on that same next-roll basis. This compares the current wagers, not the chance of reaching a regression target or a guaranteed session result.
Tools explain risk; they do not remove it
Craps outcomes remain random, and most standard casino wagers carry a house edge; exact paytables and commissions matter. These tools are for education and checking arithmetic—not predicting the next roll. Set a budget before playing and never chase losses.
Where did my money go?
A correct payout can still leave chips exposed. Follow the settlement walkthrough to see money move between rack and layout after a win, press, regression, point made and seven-out. Compare profit with returned stake before using the calculators to check your own amounts.
Compare the rules on the actual table
A triple-paying Field 12 and a Buy commission collected only on wins can change expected cost. Use the Craps Paytable Comparison to compare two sets of Field payouts or Buy-bet fee rules at the same wager amount. Check net profit, losing-decision cost and rounding before relying on a posted payout ratio.
Read an electronic wager record
Use Read Your Craps Ticket to reconcile available credits with stakes still on the layout. Worked examples explain payout labels, off bets, Buy fees and separate winning and losing components on the same roll. Then use the Payout Auditor to check your own wager amounts.