The Number You're Looking For Is 36
Walk up to any roulette table and the highest number printed on the wheel is 36. That holds whether the wheel is the European style with a single zero or the American style with a zero and a double zero. The numbered pockets run from 0 through 36, so 36 is the ceiling. What changes between wheel types is not the top number but how many zero pockets sit among the numbered ones, and that difference quietly reshapes the odds on every bet you place.
Roulette numbers are not arranged in counting order around the wheel. A wheel that read 1, 2, 3, 4 in sequence would be mechanically unbalanced and easy to predict. Instead, the numbers are distributed so that high and low, odd and even, and red and black alternate as evenly as the layout allows. The sequence differs between European and American wheels, but both contain the same 36 numbered pockets plus their respective zero pockets.
European and American Wheels Compared
The distinction that matters for your money is the number of zero pockets. A European wheel has 37 pockets total: the numbers 1 through 36 plus a single green zero. An American wheel has 38 pockets: the same 36 numbers plus a green zero and a green double zero. That one extra pocket does not change the highest number, but it does change the house edge on most bets.
| Feature | European wheel | American wheel |
|---|---|---|
| Total pockets | 37 | 38 |
| Zero pockets | One (single zero) | Two (single and double zero) |
| Highest number | 36 | 36 |
| Number range | 0-36 | 0-36 |
| House edge on a straight-up bet | Lower | Higher |
The extra pocket on the American layout increases the house edge because the zero pockets are where the house collects on bets that do not cover them. On a straight-up bet on a single number, for example, the payout is the same on both wheels, but the American wheel gives you one fewer chance in the total pocket count of hitting that number. The house edge and the return to player always sum to 100% for the same bet under the same rule set, so a higher house edge means a lower theoretical return.
How a Round Plays Out
You buy in at the table and receive coloured chips that are yours alone for that session. The dealer announces that betting is open, and you place chips on the layout. The layout mirrors the wheel but organises the numbers into rows and columns, with outside areas for broader bets like red or black, odd or even, and high or low. When betting closes, the dealer spins the wheel in one direction and sends the ball travelling the opposite way around the outer track. The ball loses momentum, drops onto the wheel, bounces among the frets, and settles in a pocket. The dealer marks the winning number on the layout, clears losing bets, and pays winners according to the posted payout for that bet type.
Every decision you make in a round happens before the spin. Once the ball is in motion and the dealer calls no more bets, nothing you do changes the outcome. Your control is limited to which bets you place and how much you stake on each.
The Main Bet Types and Their Edges
Roulette bets fall into two broad groups. Inside bets sit on the numbered grid and cover specific numbers or small groups of them. Outside bets sit around the perimeter and cover larger categories. The payout for each bet type is fixed by the table rules, and the house edge differs depending on which wheel you are playing and whether any special rules apply to even-money bets.
| Bet type | What it covers | Payout | Edge relative to other bets |
|---|---|---|---|
| Straight-up | One number | Highest fixed payout | Highest variance, same base edge as other inside bets on the same wheel |
| Split | Two adjacent numbers | Half the straight-up payout | Lower variance than straight-up |
| Street | Three numbers in a row | Lower than split | Lower variance again |
| Red or black | 18 numbers of one colour | Even money | Lower variance, edge affected by zero pockets |
| Odd or even | 18 numbers | Even money | Same structure as red or black |
| High or low | 1-18 or 19-36 | Even money | Same structure as red or black |
The payout figures are printed on the table layout or shown in the game information panel, so you can read the exact numbers before you bet. What matters structurally is that no bet on a roulette wheel removes the house edge. The zero pockets are not covered by the outside even-money bets, which is how the house maintains its advantage on those wagers. Some European tables apply a rule that changes how even-money bets settle when the ball lands in zero, and that rule lowers the edge on those specific bets. If a table offers such a rule, it will be stated on the layout or in the table's printed rules.
What the Zero Does to Your Bet
The zero is the quiet engine of the house edge. When you bet on red, you are covering 18 of the 37 pockets on a European wheel. The zero is green, so it is not red and not black. When the ball lands in zero, every red and black bet loses. The same applies to odd and even and to high and low: the zero belongs to none of those categories on the standard layout. That is the gap between the payout the table offers and the true odds of the bet, and it is why the American wheel, with its extra zero pocket, carries a higher edge on the same wagers.
This also explains why the highest number on the wheel is less important than the total pocket count. A player who only asks what the top number is has not yet asked the question that determines the cost of playing: how many pockets are on the wheel, and how many of them are green.
Procedural Mistakes New Players Make
The first mistake is placing a bet after the dealer has called no more bets. The call happens before the ball drops, and once it is made, the layout is closed. Late bets are returned or, if the ball has already settled, treated as void. Watch the dealer and listen for the call rather than watching the ball.
The second is stacking chips from different players on the same spot. Because each player at a roulette table receives a distinct chip colour, the dealer uses colour to identify whose bet is whose. If you place your chips on top of another player's, the dealer may not be able to separate them, and the payout can go to the wrong person. Place your chips so they do not overlap anyone else's.
The third is reaching onto the layout after the ball has landed. The dealer must clear losing bets and pay winners in a specific order, and any hand near the layout during settlement will be told to pull back. Wait until the dealer has finished paying and has pushed your winnings toward you before you collect them.
Strategy Charts Follow the Exact Rule Set
Roulette does not have a decision chart the way blackjack does, because after you place a bet there are no further choices in the round. But the principle that applies to blackjack basic strategy applies to roulette bet selection as well: any published guidance about which bets to make derives from the specific rule set in use. A chart or table of recommended bets assumes a particular wheel type, a particular set of payout rules, and the presence or absence of any special zero rules. If you change wheels, the guidance may no longer fit. Read the table's posted rules before you rely on any outside advice.
FAQ
Why is 36 the highest number and not 37 or 38?
The numbered pockets stop at 36 by design. The zero and, on American wheels, the double zero are separate pockets that sit outside the 1-36 sequence. So while an American wheel has 38 pockets in total, only 36 of them carry ordinary numbers.
Does the highest number pay more than other single numbers?
No. A straight-up bet on 36 pays the same as a straight-up bet on 1, 17, or any other single number. The payout for a single-number bet is fixed by the table rules and does not change based on which number you choose.
Are the numbers in order around the wheel?
No. The sequence around the wheel is deliberately scrambled so that high and low numbers, red and black, and odd and even are spread around the circumference. The exact sequence differs between European and American wheels, but neither runs in numerical order.
Play responsibly
Gambling should be treated as paid entertainment, never as a way to earn income or recover losses. 1-800-MY-RESET (1-800-697-3738)
18+ or 21+ depending on where you are; follow the minimum age that applies to you.
This article is general information about how these mechanics work. It is not legal advice and not a recommendation to gamble or to use any particular operator. Availability and legality differ by jurisdiction — check the rules that apply where you are.