French roulette is the same single-zero wheel as European roulette, with two differences that matter: the racetrack call bets, and the La Partage or En Prison rule on even-money bets. This French roulette calculator works out the stake, the chance of a win, what each bet pays and its house edge. Pick a bet, set your chip value and it’s done. Free, and no account needed.
French roulette calculator: the call bets
Call bets cover a section of the wheel rather than the layout, so they’re placed using the racetrack. Here’s what each one costs and covers, at one chip per position:
| Bet | Chips | Numbers | Pays (chips back) |
|---|---|---|---|
| Voisins du Zéro | 9 | 17 | 24 on 0, 2, 3; 18 on the rest |
| Tiers du Cylindre | 6 | 12 | 18 |
| Orphelins | 5 | 8 | 36 on 1 and 17; 18 on the rest |
| Jeu Zéro | 4 | 7 | 36 on 26; 18 on the rest |
With £5 chips, Voisins costs £45 and wins on 17 of 37 numbers, almost half the wheel. When it wins you get £90 or £120 back depending on where the ball lands. Still, every one of these bets has the same 2.70% house edge as any other bet on the wheel. They’re a quicker way to place a lot of chips, not a better deal.
La Partage and En Prison
These two rules only apply to even-money bets: red or black, odd or even, 1 to 18 or 19 to 36. Without them, zero simply loses the bet. With La Partage, you get half of it back. With En Prison, the bet stays on the table for the next spin, and if it wins then you get your stake back.
Either way, the house edge on even-money bets drops from 2.70% to 1.35%. Over 100 spins at £5, that’s an average loss of about £6.76 instead of £13.51. If your table offers either rule, even-money bets are the cheapest bets you can make.
What doesn’t change
Every other bet, from a single number to a dozen, carries 2.70% whatever the table rules. American double-zero wheels are worse at 5.26%, so French and European tables are always the better choice. For any single-zero or double-zero bet, the roulette calculator gives odds and payouts. To see how a strategy plays out over a session, try the roulette simulator.
Lower house edge means slower losses, not wins. Set a limit before you sit down. BeGambleAware.org is free and confidential if it stops being fun.