Roulette Call Bets Calculator
Calculate chip requirements, coverage, and payouts for French roulette call bets including Voisins du Zéro, Tiers du Cylindre, Orphelins, and more.
Formula:
Coverage = Numbers Covered ÷ 37 × 100%Total Bet
$45
9 chips × $5
Numbers Covered
17
45.9% of wheel
Max Payout
$110
House Edge
2.70%
Covers 17 numbers around zero on the wheel (22-25 inclusive)
$
Total bet: $45
Chip Placement
| Bet Type | Numbers | Chips | Amount | Payout |
|---|---|---|---|---|
| Split | 4-7 | 1 | $5 | $85 |
| Split | 12-15 | 1 | $5 | $85 |
| Split | 18-21 | 1 | $5 | $85 |
| Split | 19-22 | 1 | $5 | $85 |
| Split | 32-35 | 1 | $5 | $85 |
| Corner | 25-26-28-29 | 1 | $5 | $40 |
| Trio | 0-2-3 | 2 | $10 | $110 |
| Total | 9 | $45 | — | |
Numbers Covered
02347121518192122252628293235
Main Call Bets Coverage
Voisins du Zéro
17 numbers (45.9%)
Around zero: 22→25
Tiers du Cylindre
12 numbers (32.4%)
Opposite zero: 27→33
Orphelins
8 numbers (21.6%)
Two slices not in others
Together, these three bets cover all 37 numbers on the European wheel with no overlap.
Call Bets Comparison
| Bet | Numbers | Chips | Coverage |
|---|---|---|---|
| Voisins du Zéro | 17 | 9 | 45.9% |
| Tiers du Cylindre | 12 | 6 | 32.4% |
| Orphelins | 8 | 5 | 21.6% |
| Jeu Zéro | 7 | 4 | 18.9% |
Key Facts
- •Call bets cover specific wheel sections, not table sections
- •Voisins du Zéro: 17 numbers, 9 chips, 45.9% coverage
- •Tiers du Cylindre: 12 numbers, 6 chips, 32.4% coverage
- •Orphelins: 8 numbers, 5 chips, 21.6% coverage
- •Together, these three bets cover all 37 numbers
- •House edge remains 2.70% for all European roulette bets
- •Finales bets group numbers by their last digit
Frequently Asked Questions
What are Call Bets in roulette?
Call Bets (or Announced Bets) are special roulette wagers that cover specific sections of the wheel. They include Voisins du Zéro, Tiers du Cylindre, Orphelins, and others. They're called "call bets" because players traditionally announce them verbally rather than placing chips themselves.
What is Voisins du Zéro?
Voisins du Zéro ("Neighbors of Zero") covers 17 numbers near zero on the wheel (22-25). It requires 9 chips: 2 on 0/2/3 trio, and splits on 4/7, 12/15, 18/21, 19/22, 32/35, plus a corner on 25/26/28/29. It covers 45.9% of the wheel.
What is Tiers du Cylindre?
Tiers du Cylindre ("Thirds of the Wheel") covers 12 numbers opposite zero on the wheel. It requires 6 chips placed on six splits: 5/8, 10/11, 13/16, 23/24, 27/30, and 33/36. It covers about 32.4% of the wheel.
What are Orphelins?
Orphelins ("Orphans") covers the 8 numbers not included in Voisins or Tiers. These numbers appear in two slices of the wheel. It requires 5 chips: 1 straight on number 1, and splits on 6/9, 14/17, 17/20, and 31/34. Note that 17 is covered twice.
Try These Examples
Quick-start with common scenarios
How this works
Calculations follow the published mathematics of the game — combinatorics for cards, probability theory for dice, and expected-value accounting for wagers. Results are verified against independent references (primarily Wizard of Odds). No calculation here is an opinion or recommendation; it is arithmetic applied to the rules of the game.
What this tool can’t do
When to consult a professional
This tool computes probability and expected value. It is not a betting system and cannot predict the outcome of any individual wager. If gambling is causing problems for you or someone you know, call the National Problem Gambling Helpline at 1-800-GAMBLER.
Sources
- [1]Wizard of Odds — Michael Shackleford, ASAIndustrywizardofodds.comAccessed Apr 21, 2026
Actuary; widely cited casino-game probability reference. Used for house-edge and EV verification.
- [2]National Council on Problem GamblingOfficial sourcencpgambling.orgAccessed Apr 21, 2026
Responsible-gambling guidance and 1-800-GAMBLER helpline.
Joseph OrdunaFounder & Software Engineer
Full-stack software engineer specializing in embedded systems, web architecture, and AI/ML. Founder of Practical Web Tools. Built the gesture-controlled drone IP acquired by KD Interactive (Aura Drone, sold on Amazon).
Total Bet
$45
9 chips × $5
Numbers Covered
17
45.9% of wheel
Max Payout
$110
House Edge
2.70%