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Strategy
Blackjack Calculator
Enter your cards and the dealer's up card for the correct basic-strategy move.
Open CalculatorHome/Tools/Bankroll Simulator
Casino Bankroll Simulator
Set your starting bankroll and bet size, then simulate 100 rounds of flat betting and watch your balance rise and fall on a live graph.
Set your session
Adjust the inputs and run the simulation as many times as you like.
Bankroll over time
Each run uses fresh random outcomes — just like real sessions.
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Final
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Net result
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Peak
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Lowest
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Rounds played
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Set your inputs and run the simulation to see how a session might play out.
Why simulate your bankroll?
A bankroll simulator shows the reality that averages hide: variance. Even a game with a tiny house edge produces wild short-term swings — long winning streaks and painful losing runs. Seeing 100 rounds play out helps you set realistic expectations and a sensible bet size before you play for real.
How the model works
- Flat betting — the same bet every round, the simplest and safest staking plan.
- Win probability — each game uses realistic odds (single-zero roulette red/black wins about 48.6% of the time, for example).
- Bust rule — if your bankroll can't cover the next bet, the session ends.
- Fresh randomness — every run is different, so try several to see the range of outcomes.
The house edge is real
Notice how the "start" line is hard to stay above over time on the house-edge games — and how the fair coin flip drifts around the line without a built-in bias. That gap is the house edge. It's small per round but relentless over many rounds, which is exactly why bankroll discipline matters. Pair this with our blackjack calculator to make better in-game decisions.
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