What are the odds of Tie on a single Bac Bo round?

11.27% per round, or about 1 in 9. Every round is independent, so this number never changes with what came before.

How many Bac Bo rounds until Tie is likely?

On average one hit every 9 rounds; half of all waits are over within 6 rounds. For a 90% chance of at least one hit you need 20 rounds, for 99% about 39.

Is Bac Bo "due" a Tie after a long wait?

No. A wait of 120 rounds without Tie happens 0.0% of the time from any starting point, and the next round still has the same 11.27% chance. The calculator tells you how unusual a wait is, not that a hit is coming.

Where do the theoretical and observed numbers come from?

Theoretical odds use the published rules (content-src/guides/bac-bo/rtp.md). Observed figures come from the rounds our tracker has recorded and change as new rounds arrive.

Bac Bo Bonus probability calculator

Tie lands on 11.27% of Bac Bo rounds (1 in 9). Pick an outcome and a number of rounds to see the odds, the average wait and how unusual the current drought is.

Game

OutcomeNext N roundsRounds since last hit

At least once in 50

99.7%

Chance per round

11.27%

1 in 8.9

Average wait

median 6 rounds

Rounds for 90% / 99%

20 / 39

A wait of 25 rounds without Tie has a 5.0% chance of happening from any starting point: ordinary - roughly one wait in ten runs this long or longer. The next round's chance is still 11.27%.

Formulas: P(at least one in N) = 1 - (1 - p)^N; average wait = 1 / p; P(wait ≥ k) = (1 - p)^k.

Theoretical p = the published rules; source: content-src/guides/bac-bo/rtp.md.

Each round is independent: past results do not change the next round's odds, and no wait makes an outcome "due". Theoretical figures come from the provider's published rules; observed figures come from our own tracker and change as rounds arrive. 18+. Past results do not predict future outcomes. Play with money you can afford to lose.

Frequently asked questions

What are the odds of Tie on a single Bac Bo round?: 11.27% per round, or about 1 in 9. Every round is independent, so this number never changes with what came before.
How many Bac Bo rounds until Tie is likely?: On average one hit every 9 rounds; half of all waits are over within 6 rounds. For a 90% chance of at least one hit you need 20 rounds, for 99% about 39.
Is Bac Bo "due" a Tie after a long wait?: No. A wait of 120 rounds without Tie happens 0.0% of the time from any starting point, and the next round still has the same 11.27% chance. The calculator tells you how unusual a wait is, not that a hit is coming.
Where do the theoretical and observed numbers come from?: Theoretical odds use the published rules (content-src/guides/bac-bo/rtp.md). Observed figures come from the rounds our tracker has recorded and change as new rounds arrive.

More on Bac Bo: live results · RTP & odds · bonus rounds · Bet value calculator