Wheel
Table
Tap a number or an outside bet to place the chip you picked. Pays 35 to 1 on a single number, 2 to 1 on dozens and columns, evens on red, black, odd, even, 1-18 and 19-36. Play money only.
A roulette simulator is the cheapest way to learn why every system looks brilliant for twenty spins and much less clever by spin 200. You get the lesson without paying for it. Above you’ve got a free single-zero wheel with £1,000 of play money, a full table, and a strategy tester that runs Martingale, Fibonacci and friends a thousand sessions at a time.
Nothing here is real money and nothing is saved. Spin as much as you like.
Playing the roulette simulator
Pick a chip, tap where you want it, and spin. You can stack chips on single numbers, dozens, columns, red or black, odd or even, and 1–18 or 19–36. Your bets stay on the table between spins unless you untick that, which is handy if you’re testing a pattern by hand. The panel next to the wheel keeps score: balance, spins, how much you’ve bet in total, and how much of it the wheel has paid back.
That last number is worth watching. Over a few spins it can be 300% or 0%. Over a few hundred it drifts toward 97.3% on a single-zero wheel. That 2.7% gap is the house edge, and no bet on the table avoids it. Switch to a double-zero wheel and it jumps to 5.26%.
Testing a strategy
Choose a system, what to bet on, a starting bet, your bankroll and how many spins to play. “Run one session” draws the bankroll spin by spin, which is where Martingale’s personality really shows: a long, gentle climb, then a cliff.
“Run 1,000 sessions” is the more honest test. With £5 Martingale on red, a £500 bankroll and 250 spins, the share of sessions that finish ahead tends to land around 40%, and more than half go bust along the way. Flat betting rarely busts but finishes ahead even less often. Every system ends up with a negative average. They just spread the loss differently.
The table limit matters more than people think. Seven reds in a row isn’t rare, and from a £5 start Martingale needs a £640 bet on the eighth spin. Lower the table maximum under the extra options and watch what happens.
Why a stop target feels like it works
Set “stop when up by” to £50 and run 1,000 Martingale sessions. Roughly nine in ten hit the target. That feels like a winning system right up to the tenth session, which loses most of the £500 and wipes out the other nine. Small, frequent wins paid for by rare, large losses is what nearly every progression looks like.
For the exact numbers behind each bet, the roulette calculator shows odds and expected value, and the Martingale calculator works out how many losses in a row your bankroll can survive.
A simulator is for learning the maths, not for finding a way to beat the wheel. There isn’t one. BeGambleAware.org is free and confidential if it stops being fun.