Compare roulette rules using the same bet, stake and number of rounds. See the difference in win probability, payout and theoretical cost—without placing a bet.
Comparison results
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What the numbers mean
Expected cost is an average, not a session prediction or a spending limit. Actual losses can be much larger, and a short session can end ahead. The calculation assumes every selected round is played at the same stake: stake × rounds × house edge. It does not model stopping early, a limited bankroll or changing bets.
A unit is any consistent stake amount. Betting one unit 100 times creates 100 units of turnover even if you reuse the same balance. Profit payout excludes the returned winning stake. Full-win probability excludes a La Partage half-refund.
Standard rules at a glance
| Rules | Pockets | Even-money edge | Zero on an even-money bet |
|---|---|---|---|
| Single-zero | 37 | 2.70% | Full loss |
| Double-zero | 38 | 5.26% | Full loss on 0 or 00 |
| Single-zero + La Partage | 37 | 1.35% | Half the stake returned on 0 |
La Partage only changes eligible even-money bets. Other conventional single-zero bets retain a 2.70% edge. The American five-number basket pays 6:1 with a 7.89% edge. The tool excludes multiplier, jackpot, mini-wheel and triple-zero variants; check their complete paytables separately.
Why is En Prison explained separately?
En Prison can hold an eligible even-money stake after zero, with later settlement depending on the table’s rules. A winning release normally returns the imprisoned stake without profit. Repeat-zero treatment and the definition of a completed round matter. This tool does not assume a particular En Prison settlement or treat a held stake as an immediate La Partage refund. Read the French roulette guide and the actual table rules.
How is the house edge calculated?
For k covered pockets, N equally likely pockets and a b:1 profit payout, expected net return per unit is (k × b − (N − k)) / N. The house edge is its negative. For single-zero La Partage even-money bets, zero loses half a unit instead of one, giving an edge of 0.5/37. See roulette maths and Wizard of Odds’ roulette reference.
These are rule comparisons, not casino recommendations. A lower house edge still favours the casino. Betting systems do not remove it.