Free tool
How lucky was your roulette session?
You won $300 in an hour — skill, a good system or just luck? Enter the system you played, your bankroll, how many spins and what you won or lost. We replay the same session with 10,000 simulated players and show where you landed.
Why a winning night says so little
Most betting systems win small amounts often and lose a large amount rarely. Over a few hours that shape makes most players go home ahead — even though the average result over all players is still the house edge. So a good night is usually just a normal night for that system, and a great night is luck.
The calculator plays your exact session 10,000 times: the same system, bankroll, bet size, wheel and number of spins. If you beat 95% of those players, you were luckier than 95% of the people who could have sat at that table. It doesn't make the next session any more likely to go the same way — every spin is independent.
Want to see how a system does over thousands of sessions? Every system page shows the win rate, the bust risk and the average result from 10,000 players — or look at the 100 Club.
Questions
How does the luck calculator work?
It simulates 10,000 players who play exactly your session: the same system, bankroll, first bet, wheel and number of spins. Then it counts how many of them ended below your result. That share is how lucky you were.
I won — does that mean my system works?
Not on its own. Many systems win in most sessions and lose big in a few. If most simulated players also ended ahead, your win was normal for the system, not proof that it beats the house edge. The average over all players is always negative.
What if my system isn't in the list?
Pick the closest one, or build it yourself in the free System Builder and test it on 10,000 players. You can also send it to us for the catalog.
Is a lucky session a sign that I should keep playing?
No. The wheel has no memory, so a lucky session tells you nothing about the next one. If you are ahead, that is a fine moment to stop.