D'Alembert Staking System Calculator (AUD)
Up one unit after a loss, down one after a win — a gentle progression.
The D’Alembert is a mild negative progression: add one unit to your stake after a loss and subtract one after a win, never dropping below a single unit. It’s far tamer than doubling-based plans.
Set the unit (a percentage of your starting bank) and play a sequence. Stakes step up and down one unit at a time.
How it works
The idea is that wins and losses roughly alternate over time, so stepping down on wins and up on losses banks a little each cycle. It recovers a losing run more slowly than a martingale, and far more safely.
It is still a progression: a long cold run lifts your stake steadily, so it can’t create an edge you don’t have. The single-unit step keeps the escalation linear, not exponential.
stake = units × unit; +1 unit after a loss, −1 after a win (floor 1 unit).
Worked example
- Start $10. Loss → $20. Loss → $30. Win → $20. Win → $10.
- The stake climbs one unit per loss and eases back one per win.
Play it out above to see the linear step in action.
FAQ
- What is the D’Alembert system?
- A staking progression that raises the stake by one unit after a loss and lowers it by one after a win, with a floor of one unit.
- Is D’Alembert safer than Martingale?
- Much safer — stakes rise linearly (one unit at a time) rather than doubling, so a losing run grows the stake gently instead of exponentially. It still can’t beat the odds.
- Does D’Alembert win long-term?
- No staking plan changes the house edge. A long enough losing run still loses; the progression only reshapes the order of the swings.
Save your sessions, track your real P&L and closing-line value, and sync across devices with a free OutlayHQ account.
Create a free account →One email a month — staking, value and bankroll ideas. No tips, ever.