Roulette Wheel Simulator
Spin an American or European roulette wheel, place a bet, and watch the results land. Run a single spin or thousands at once to see how your realized results compare to the wheel's true house edge. Also try the craps simulator or the baccarat simulator.
Bankroll
$1000
Spins
0
Realized edge
—
Theoretical edge
5.26%
Why the wheel always wins in the long run
Every even-money bet on a roulette wheel — red, black, odd, even, high, low — pays 1:1. But the wheel itself has more losing pockets than a fair coin flip would allow: the American wheel adds a 00 pocket on top of 0, and the European wheel keeps just the single 0. That extra green pocket is the house edge, and it applies to every spin regardless of what you bet or how much.
Run this simulator for 10,000+ spins and watch your realized edge settle near 5.26% (American) or 2.70% (European) — no betting system changes that number, because each spin is independent of the last.
Frequently asked questions
Is this roulette wheel simulator free?
Yes. It runs entirely in your browser, requires no signup or download, and does not use real money.
What's the difference between the American and European wheel?
The American wheel has 38 pockets (1-36 plus 0 and 00), giving the house a 5.26% edge on even-money bets. The European wheel has 37 pockets (1-36 plus a single 0), cutting the house edge to 2.70% — almost half.
Can I test betting systems like Martingale here?
Yes — place a bet, spin repeatedly, and track your bankroll. Every spin is independent and the house edge is fixed regardless of your bet sizing, so you can see for yourself why no staking system changes the long-run math.
Why does my realized result differ from the theoretical house edge?
Short sessions carry real variance — a few hundred spins can land well above or below the true edge purely by chance. Run 10,000+ spins and the realized edge converges toward the theoretical number.
Does this simulator use real money?
No. This is a free educational tool and does not facilitate real-money wagering.