How to use the roulette odds calculator
- Choose the wheel: European (single zero), French (single zero with la partage) or American (double zero).
- Pick a bet type — from a straight-up number to red/black.
- Enter your stake.
You'll see what the bet pays, your chance of winning each spin, the house edge and your average loss per spin.
Worked example
A $10 bet on red at three tables:
| Wheel | Win chance | House edge | Avg. loss per spin |
|---|---|---|---|
| French (la partage) | 48.65% | 1.35% | $0.14 |
| European | 48.65% | 2.70% | $0.27 |
| American | 47.37% | 5.26% | $0.53 |
Same bet, same payout — but the American wheel costs nearly four times as much as the French one.
Every bet at a glance
| Bet | Covers | Pays | Win chance (European) | Win chance (American) |
|---|---|---|---|---|
| Straight up | 1 number | 35:1 | 2.70% | 2.63% |
| Split | 2 numbers | 17:1 | 5.41% | 5.26% |
| Street | 3 numbers | 11:1 | 8.11% | 7.89% |
| Corner | 4 numbers | 8:1 | 10.81% | 10.53% |
| Five-number (0-00-1-2-3) | 5 numbers | 6:1 | — | 13.16% |
| Six line | 6 numbers | 5:1 | 16.22% | 15.79% |
| Dozen / column | 12 numbers | 2:1 | 32.43% | 31.58% |
| Red/black, odd/even, 1–18/19–36 | 18 numbers | 1:1 | 48.65% | 47.37% |
The house edge is 2.70% on every European bet and 5.26% on every American bet except the five-number bet (7.89%) — the worst bet on the table.
What the numbers don't tell you
The calculator shows probabilities for one spin. It can't predict streaks: the wheel has no memory, so red is no more likely after ten blacks. No betting system changes the house edge, though it can change how your results are spread. Read roulette odds and payouts for the full chart and the maths, then find single-zero tables on our online roulette page.
