Bankroll Calculator
Risk of ruin, required buy-ins, and downswing odds from your winrate and variance.
Risk of Ruin4.39%
Required Bankroll1,918 bb
Required Buy-ins19.2
Current Buy-ins20.0
Downswing Probabilities
| Downswing | Chance It Ever Happens |
|---|---|
| 10 buy-ins (1,000 bb) | 21.0% |
| 20 buy-ins (2,000 bb) | 4.4% |
| 30 buy-ins (3,000 bb) | 0.9% |
| 50 buy-ins (5,000 bb) | 0.0% |
A buy-in is 100 big blinds. Probabilities are lifetime chances of ever hitting that downswing while playing at this winrate.
The model assumes your winrate and variance stay constant and you never move down in stakes. Real players move down during downswings, which makes true risk lower — treat these numbers as a conservative guide.