Roulette tables offer dozens of betting options, from simple Red/Black wagers to complex “Flower” or “Snake” bets covering specific numbers. But how much of the wheel are you actually covering? And what does that coverage cost you mathematically?
Our Roulette Bet Builder lets you enter bets on Red, Black, and Zero to see your total exposure per spin. The reference tables and examples below then show you the coverage, expected value, and volatility math for every bet type on the roulette table — the essential context for understanding what any combination of bets actually costs.
How to Use the Bet Builder
- Bet on Red ($): Enter the amount you want to place on Red (covers 18 numbers, pays 1:1).
- Bet on Black ($): Enter your Black bet. Betting both Red and Black is legal but guarantees a loss when zero hits.
- Bet on Zero ($): Enter a Straight Up bet on zero (covers 1 number, pays 35:1). This is the number that gives the casino its edge.
- Total Exposure: The calculator sums your bets to show your total amount at risk per spin.
The reference table and examples below cover all other bet types (Split, Street, Corner, Six Line, Dozens, Columns) with their payouts, coverage, and probability. Use these references alongside the calculator to understand the full math of your roulette strategy.
Roulette Bet Types Reference
While the Bet Builder above covers the three most common even-money and zero bets, the full roulette table offers many more options. Every bet has the same house edge (2.70% European, 5.26% American), but different payout ratios and coverage levels create very different volatility profiles:
| Bet Type | Payout | Numbers Covered | Win Probability (EU) | Volatility |
|---|---|---|---|---|
| Straight Up | 35:1 | 1 | 2.70% | Extreme |
| Split | 17:1 | 2 | 5.41% | Very High |
| Street | 11:1 | 3 | 8.11% | High |
| Corner | 8:1 | 4 | 10.81% | High |
| Six Line | 5:1 | 6 | 16.22% | Medium |
| Dozen / Column | 2:1 | 12 | 32.43% | Low-Medium |
| Red/Black, Odd/Even, High/Low | 1:1 | 18 | 48.65% | Low |
All bets carry the same 2.7% edge on European roulette. The difference is volatility: Straight Up bets win rarely but pay big (35×), while Even Money bets win often but only double your stake. Understanding these tradeoffs helps you choose the risk/reward balance you prefer.
The “Cover All” Myth
A common mistake is thinking that covering more numbers increases your profit. While it increases your chance of winning on a specific spin, it does not change the house edge.
If you bet $1 on all 37 numbers on European roulette, you spend $37 per spin. Every spin, one number hits — you receive $36 (35:1 payout + $1 stake). Net result: −$1 per spin, guaranteed. That is $1/$37 = 2.7% — exactly the house edge. Covering the whole table guarantees a win, but guarantees a net loss.
You can test a simplified version with the Bet Builder: enter $18 on Red, $18 on Black, and $1 on Zero. Total bet: $37. On every possible outcome — Red, Black, or Zero — you get back exactly $36. That is a guaranteed loss of $1 per spin, or $1/$37 = 2.7%. No combination of bets escapes the house edge.
Example: The James Bond Strategy
One popular multi-bet pattern (which requires bet types beyond Red/Black/Zero, so it cannot be fully entered in the calculator above — this is a mathematical reference):
$14 on High (19-36), $5 on the Six Line (13-18), $1 on zero. Total bet: $20 per spin. Coverage: 25 of 37 numbers (67.6%).
If High hits (19-36): you win $14 (1:1) + lose $5 + lose $1 = +$8. If 13-18 hits: you lose $14 + win $25 (5:1 on $5) + lose $1 = +$10. If zero hits: you lose $14 + lose $5 + win $35 (35:1 on $1) = +$16. If 1-12 hits: you lose $14 + lose $5 + lose $1 = −$20.
You win on 25/37 spins (+$8 to +$16) and lose on 12/37 spins (−$20). Expected value per spin: (25/37 × $8.80 avg) − (12/37 × $20) = −$0.54. That is $0.54/$20 = 2.7%. The house edge is identical to a flat $20 bet on Red.
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