What You Are Sitting Down To
You approach a roulette table and the first thing you notice is that the felt is not laid out the way you remember from other casinos. The betting area is long and narrow, the number boxes run down both sides of a central column, and every word printed on the cloth is in French. That layout is not decoration. French roulette is a distinct format with its own wheel arrangement, its own bet names, and two rules that change what happens to your money when the ball lands on zero. Before you put a chip down, you need to know which version of the wheel you are looking at, because that single fact determines the arithmetic of every bet you will make.
A French roulette wheel carries 37 pockets, numbered 0 through 36. The zero pocket is green; the rest alternate red and black. The sequence of numbers around the wheel is not the same as the sequence printed on the table, and that matters only for neighbours bets, which we will cover later. What matters immediately is that the wheel has a single zero and no double zero. The house edge on the standard even-money bets is lower on this wheel than on a double-zero wheel, and the two French rules described below reduce it further under specific conditions.
The Sequence of a Round
A round of French roulette moves through four phases: placing bets, the spin, the settlement, and the zero rule. Each phase has a clear boundary, and the mistakes new players make almost always happen at a boundary.
Placing bets. The croupier opens the betting window and announces it, usually with the French phrase for place your bets. You put chips on the layout yourself, or you hand cash to the croupier and state the bet you want, and the croupier places it with house chips. You may place multiple bets on the same spin. There is a table minimum and maximum, and they apply to the total of certain categories of bet rather than to every chip individually; the posted placard at the table states exactly how the limits are counted.
The spin. The croupier closes the betting window, announces that no more bets are accepted, and sends the ball around the rim in the opposite direction to the wheel's rotation. Once the ball is released, you cannot touch your chips, add to them, or remove them. Late bets are void or returned, depending on the house procedure.
The settlement. The ball falls into a pocket. The croupier places a marker on the winning number on the layout, clears all losing bets, and then pays winning bets. Inside bets are paid at the odds printed on the layout; even-money bets are paid one to one unless the zero rule applies.
The zero rule. If the winning number is zero and you have an even-money bet on the table, the round is not settled the way it would be on other wheels. The croupier applies either la partage or en prison, and which one applies is stated in the table rules before you play. This is the most important procedural difference in French roulette, and it is worth understanding before you sit down.
French Roulette vs European and American Layouts
French roulette, European roulette, and American roulette share the same core mechanic, but they differ in wheel construction, table layout, and the treatment of even-money bets when zero appears. The comparison below sets out what changes and what stays the same.
| Feature | French roulette | European roulette | American roulette |
|---|---|---|---|
| Number of pockets | 37 (single zero) | 37 (single zero) | 38 (single and double zero) |
| Table language | French bet names and markings | Usually English or local language | Usually English or local language |
| Layout shape | Wide, with number columns on both sides | Compact, numbers in a central block | Compact, numbers in a central block |
| Zero treatment on even-money bets | La partage or en prison applied | Usually lost in full | Usually lost in full |
| House edge on even-money bets | Lower when a zero rule applies | Higher than French with a zero rule | Higher still due to the double zero |
The wheel type is the controlling fact. A single-zero wheel with no zero rule is the European arrangement; a single-zero wheel with la partage or en prison is the French arrangement. The language on the felt is a strong signal, but the zero rule is what defines the format.
The Bet Types and Their Edges
Every roulette bet is a wager on where the ball will land. The bets divide into two families: inside bets, which are placed on the numbered part of the layout and pay at longer odds, and outside bets, which are placed on the surrounding boxes and cover larger groups of numbers at shorter odds. The table below lists the main bets, what they cover, and how they differ in edge.
| Bet | French name | Numbers covered | Payout | Edge comparison |
|---|---|---|---|---|
| Straight up | En plein | 1 | 35 to 1 | Highest edge of the standard bets |
| Split | Cheval | 2 | 17 to 1 | Same edge as straight up |
| Street | Transversale | 3 | 11 to 1 | Same edge as straight up |
| Corner | Carré | 4 | 8 to 1 | Same edge as straight up |
| Six line | Sixain | 6 | 5 to 1 | Same edge as straight up |
| Dozen | Douzaine | 12 | 2 to 1 | Same edge as straight up |
| Column | Colonne | 12 | 2 to 1 | Same edge as straight up |
| Red/black, odd/even, high/low | Rouge/noir, impair/pair, manque/passe | 18 | 1 to 1 | Lower edge when a zero rule applies |
On a single-zero wheel without a zero rule, the house edge on every standard bet is the same proportion of each wager. On a French table where la partage or en prison applies, the even-money bets carry a lower edge than the inside bets, because the zero rule returns part or all of the stake under defined conditions. That does not make the even-money bets a way to win; it makes them a way to lose more slowly on average, and only when the zero rule is in force.
There are also announced bets, sometimes called call bets, which are placed verbally and cover sections of the wheel rather than blocks of the layout. Voisins du zéro covers a group of numbers around the zero pocket; tiers du cylindre covers the opposite section; orphelins covers the numbers left over. These bets are settled as combinations of straight-up and split bets, and their edge is the same as the underlying bets that make them up. They exist because the French wheel sequence places certain numbers next to each other, and the layout does not show those relationships.
La Partage and En Prison in Detail
These two rules apply only to even-money bets when the ball lands on zero, and they are the reason a French table is materially different from a European one.
La partage means the sharing. When zero comes up, the house takes half of each even-money stake and returns the other half to the player. The bet is settled immediately. If you had 10 units on red and zero appears, you receive 5 units back and the other 5 units are lost.
En prison means in prison. When zero comes up, the even-money stake is not taken and not paid. It is held on the layout, marked as imprisoned, and carried to the next spin. If the next spin wins, the full stake is returned without winnings. If the next spin loses, the stake is collected. If zero appears again, the stake may remain imprisoned or be subject to a further rule, depending on the table's posted procedure.
The two rules are alternatives: a given table uses one or the other, and the table rules state which. Both reduce the expected loss on even-money bets compared with a table where zero takes the whole stake. En prison is generally the more favourable to the player, because the stake has a chance to survive the next spin, but the difference is small and only shows up over a very large number of zero events.
What Strategy Charts Depend On
Roulette has no decision that changes the underlying probability of any bet. Unlike blackjack, where a published basic-strategy chart derives from a specific rule set, roulette strategy is limited to choosing which bets to place, how much to stake, and when to stop. The table rules do not change the odds of a straight-up bet; they change only the treatment of even-money bets on zero.
That said, the rule set in use is the single most important thing to read before you play. A French table with la partage and a French table with en prison are not the same game in the zero pocket, and a French table with neither rule is simply a European wheel with French markings. The placard at the table states the rule, the minimum and maximum, and how announced bets are handled. Read it before the first spin, because once the ball is moving you are committed to the bets you have placed.
Procedural Mistakes That Cost New Players
The errors that cost new players on a French table are almost never about picking the wrong number. They are about the sequence of the round and the treatment of the zero.
The first is betting after the window closes. Once the croupier announces no more bets, any chip that lands on the layout is late. Depending on the house procedure, a late bet is either returned or voided, and if it is voided you have lost the chance to bet on that spin without gaining anything. Watch the croupier's hand and the announcement, not the ball.
The second is misunderstanding what the zero rule does to an even-money bet. A player who does not know whether the table uses la partage or en prison will misread the settlement when zero appears, and may argue with the croupier over a rule that was posted before the spin. The rule is stated at the table; read it before you place an even-money bet.
The third is mixing up the French bet names. A cheval is a split, not a corner; a transversale is a street, not a line. If you are placing bets verbally rather than with your own hand, state the numbers you want and the amount, and let the croupier confirm the bet back to you before the spin. A misheard call bet is settled as placed, not as intended.
FAQ
What is the difference between French roulette and European roulette?
Both use a single-zero wheel with 37 pockets. The difference is the table layout, which is wider and labelled in French, and the zero rule: a French table applies la partage or en prison to even-money bets when zero appears, while a European table typically takes the full even-money stake.
Do la partage and en prison apply to all bets?
No. They apply only to even-money bets: red or black, odd or even, and high or low. Inside bets and dozen or column bets are settled normally when zero appears, and the house takes the full stake on a losing inside bet.
Can I use a betting system to overcome the house edge in French roulette?
No betting pattern changes the built-in edge of any roulette bet. Progression systems that increase stakes after losses redistribute outcomes across a session; they do not change the long-run average, and they can produce large single-session losses when a losing streak runs longer than the bankroll allows.
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