Simulator
Bankroll simulator
Choose a game, your bankroll, your stake and the number of rounds: the simulator calculates the exact average loss, then simulates thousands of sessions to show the risk of wiping out your bankroll and the possible deviation from the average.
Result
Example: 200 rounds at €2 on an even-money bet in European roulette, with a bankroll of €100. Change the session to match yours.
Amount wagered
€400
200 rounds at €2
Expected average loss
€10.81
House edge: 2.70%
Bankroll used up before the end
0.0%
Share of the 2,000 simulated sessions
Sessions ending in profit
32.8%
Final balance above the starting bankroll
- Final balance: 10% of sessions below
- €52
- Median final balance
- €88 (−€12)
- Final balance: 10% of sessions above
- €124
- Average rounds played
- 200
The calculation in detail
- House edge calculated exactly from the game’s probabilities: 2.70% of every bet.
- Average loss = amount wagered €400 × 2.70% = €10.81.
- Spread: 2,000 sessions of 200 rounds simulated with a reproducible draw; a session stops if the balance no longer covers the stake.
What the calculation does not tell you
- The expected value is an average over a very large number of rounds; a real session can differ from it in either direction.
- No betting system (martingale, paroli…) changes the house edge: it only moves the risk around.
- A bonus is never a reason to deposit more than planned. Staying in control
Two results, two methods
The average loss is exact: it is the amount wagered multiplied by the house edge, calculated from the game’s probabilities (European roulette, eight-deck baccarat) or from the stated RTP (crash games, slot machines).
The spread comes from a simulation: thousands of identical sessions are played with a reproducible pseudo-random draw, the same input always giving the same result. It shows the share of sessions that wipe out the bankroll before the end, the share that finish with a profit, and the balances of the unluckiest and luckiest sessions.
What the simulation shows
The larger the stake relative to the bankroll, the higher the risk of ruin, even on a game with a low house edge. A bet on a single roulette number loses on average as much as a bet on red, but its results are far more spread out: many losing sessions, a few big wins.
No betting system (martingale, paroli, progressive betting) changes the house edge: it only changes the shape of the risk.
Slot machines
Slot providers publish the RTP of their games, not the distribution of their wins. The simulator therefore calculates only the expected value of a slot session, without inventing a distribution.
Play responsibly
A simulated session is not a strategy. Set a budget you can afford to lose, and stop when it is reached. If gambling is no longer fun, see the responsible gambling page: it lists helplines for each country.
