Same payout. Different game. The American double-zero nearly doubles the house edge on every outside bet, the column included. If you have a choice of wheel, the choice is already made.
The architecture of each wheel
A European roulette wheel has 37 pockets: the numbers 1 through 36, alternating red and black, plus a single green zero. An American wheel adds a second green pocket - 00 - for 38 total. Both wheels have identical number arrangements for 1–36; the only difference is the second green slot.
Column bets cover 12 numbers on either layout. The 2 to 1 payout is universal. The probability - and therefore the cost of playing - is not.
Probability comparison
| Bet | EU Probability | US Probability | Probability Gap |
|---|---|---|---|
| Single column | 32.43% | 31.58% | 0.85 pp |
| Single dozen | 32.43% | 31.58% | 0.85 pp |
| Red or Black | 48.65% | 47.37% | 1.28 pp |
| Straight up | 2.70% | 2.63% | 0.07 pp |
The gap is small in absolute terms but enormous in relative terms - and it accumulates across every spin of every session.
House edge: 2.70% vs 5.26%
Each spin of a $10 European column bet costs you 27 cents in expectation. The same bet on an American wheel costs you 53 cents. Across a 200-spin session that's the difference between losing $54 and losing $106 - almost exactly double - for the same number of decisions.
If your goal is entertainment, this still buys hours of play. If your goal is bankroll preservation while running progressions, the difference is decisive.
"En Prison" and "La Partage" - European-only mercy
Some European tables (especially French roulette) offer one of two rules that further reduce the house edge on even-money bets (red/black, odd/even, low/high):
- La Partage: when zero hits, half your even-money stake is returned.
- En Prison: when zero hits, your stake is "imprisoned" for the next spin - win and you recover the full original stake; lose and it goes to the house.
Neither rule applies to column or dozen bets. Outside 2:1 wagers retain the standard 2.70% / 5.26% edge regardless of these mercy mechanics.
Where each wheel is found in 2026
- Las Vegas Strip: American (00) is the default on mass-floor tables. Single-zero is available in high-limit rooms.
- Atlantic City, Detroit, Pennsylvania: mixed - both layouts present.
- Online USA (NJ, PA, MI, etc.): most regulated operators offer both versions; always check the wheel before sitting down.
- Ontario iGaming: single-zero is the default on most licensed operators' live-dealer feeds.
- Europe and UK: single-zero is universal; double-zero "American" tables are a curiosity.
The practical takeaway
The Column.bet content on system selection (Column Martingale, Double Column) assumes a European wheel unless explicitly stated. American-wheel numbers are roughly twice as punishing across every system.
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Responsible Gaming
Every system on this site is educational. None eliminate the house edge. Set a loss cap and a time cap before every session.
USA: 1-800-GAMBLER · Canada (ON): ConnexOntario