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On the standard CS2 roulette wheel, a colour bet wins 7 times in 15 (46.7%) and pays 2x, so you get back 93.3% of your stake over time. The house edge is 6.67%. That is more than double the 2.7% edge of single-zero casino roulette, and it applies to every bet on the wheel.
What are the odds of the bonus (green) slot?
The bonus slot is one slot out of 15, so it comes up 1 time in 15 on average: 6.7%. Each colour comes up 7 times in 15: 46.7%. Rounds are independent, so the green slot is never "due" after a long run without it. A site's round history may show streaks, and streaks are normal in random data.
Slots 1–7: orange (T), pays 2xSlots 8–14: blue (CT), pays 2xSlot 0: gold bonus, pays 14x
| Bet | Winning slots | Win chance | Pays | Return per unit staked |
|---|---|---|---|---|
| First colour (1–7) | 7 of 15 | 46.7% | 2x | 0.933 |
| Second colour (8–14) | 7 of 15 | 46.7% | 2x | 0.933 |
| Bonus slot (0) | 1 of 15 | 6.7% | 14x | 0.933 |
How big is the house edge?
Take the chance of winning, multiply it by the payout, and you have the return to player (RTP). For a colour bet: 7/15 × 2 = 0.933. For the bonus slot: 1/15 × 14 = 0.933. The house edge is what is left: 1 − 0.933 = 6.67%.
Because every bet on this wheel has the same RTP, you cannot find a "cheaper" bet by switching between colours and the bonus slot. Switching only changes how bumpy the ride is: the bonus slot wins rarely and pays a lot, so its results are far more volatile than a colour bet's.
Why does the bonus slot pay 14x?
Because 14x makes its RTP equal to the colours'. A fair payout for a 1-in-15 chance would be 15x, and a fair payout for a 7-in-15 chance would be 15/7 = 2.14x. Sites pay 2x and 14x instead, which is one unit less than fair on the bonus slot and 0.14 less on each colour. That gap is the house edge.
How does it compare with casino roulette?
| Wheel | Layout | Even-money payout | House edge |
|---|---|---|---|
| Standard CS2 roulette | 7 + 7 + 1 bonus (15 slots) | 2x | 6.67% |
| Two-colour wheel, 1.95x payout | 50% / 50% | 1.95x | 2.50% |
| European (single zero) | 37 slots | 2x | 2.70% |
| American (double zero) | 38 slots | 2x | 5.26% |
Sites can vary the wheel. Some add a themed extra tile with its own multiplier, such as a 7x option. When a site does not publish how many slots a tile occupies, you cannot compute its edge, and you should treat the extra bet with caution.
Which site has the best return?
The standard 2x/14x/2x wheel with 15 slots is published by three of the six sites: PLG.bet, CSGOEmpire and 500 Casino. All three give the same 6.67% on colour bets. For CSGOFast and CSGORoll the payouts are published (x2, x2, x14 and a 7x option) but the slot counts are not, so we do not compute an edge for them. Check the site's own wheel before you rely on any figure here, and compare it with the full ranking of CS2 roulette sites.
Whatever a site quotes, work out the edge from its slots and payouts, as above.
House edge calculator
Enter any wheel to check the maths. The default is the standard layout.
House edge calculator
Enter the wheel of any site to see win chance, return to player, house edge and expected loss. Defaults are the standard 15-slot wheel with a 2x colour bet.
Expected loss is an average over many sessions, not a prediction: a single session can end well above or well below it. This is a maths tool, not betting advice.
For what to do with these numbers, read strategy and bankroll management, and compare other modes in roulette versus crash, coinflip and cases.
See the full ranking of the best CS2 roulette sites and the methodology behind it. Facts last reviewed 9 November 2026.