Roulette Guide, Odds & Virtual-Credit Demo

01 / PLAY & OBSERVE

Roulette virtual demo

Educational model

Loading the virtual demo…

02 / UNDERSTAND THE CHOICE

Roulette guide

The mechanic

Roulette selects one wheel pocket. The reference here has 37 equally likely pockets: 18 red, 18 black and one green zero. Color bets return 2x gross; a winning zero or single-number bet returns 36x gross. Custom color wheels and double-zero tables require their own probabilities and payouts. Previous spins do not change an independent next spin.

The decision to notice

Trade a more frequent hit rate for a smaller payout, or accept rarer outcomes for a larger quoted return.

Guide category: Casino
Guide volatility: Medium
Guide difficulty: Easy
Documented round speed: Not documented
Operator autoplay metadata: Not documented

03 / CHECK THE MODEL

Odds & mathematics

Probability describes frequency, gross return includes the original stake, and player net subtracts it. House edge is a long-run cost, not positive player expected value. None predicts a session.

Educational reference only, not operator odds or a claim about any independent lab. Operator limits, timing, availability and current fairness are not specified.
All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
37-pocket single-zero reference; color bets return 2x gross and zero/single-number bets 36x gross. Other layouts need different probabilities.
Popularity is unmeasured (legacy value 0). Difficulty is an editorial learning label; volatility describes the reference payout structure, not an independently measured operator rating.

Single-zero wheel model

37 equally likely pockets: 18 red, 18 black and one green zero, as in this virtual demo. No fees or special rules. A CS2 color wheel can use a different layout and paytable.

Stake-inclusive gross returns; net expectation per credit staked.
Selection	Probability	Gross return	House edge	Expected player net / credit
Red or black	48.65%	2.00×	2.70%	-0.0270 credits
Green zero	2.70%	36.00×	2.70%	-0.0270 credits
Single number	2.70%	36.00×	2.70%	-0.0270 credits
Odd or even	48.65%	2.00×	2.70%	-0.0270 credits
One dozen	32.43%	3.00×	2.70%	-0.0270 credits

Guide reference examples

These references are separate from the interactive model. A single row is not a complete distribution, particularly for pushes, multiple payouts, item values or fees. Missing expected net is not computed from an isolated row.

Guide examples, not current operator odds. Read the assumptions and payout basis for each row.
Scenario	Reference probability	Quoted payout & basis	Reference house edge	Expected player net / credit	Assumptions
Red or black (one color)	48.64864865%	2x grossGross return (includes stake)	2.7027027%	-0.02702703 units per 1 staked	Single-zero reference: 37 equiprobable pockets 0..36; 18 red, 18 black and one zero. Zero loses color bets. Success returns 2x gross; failure returns 0. Success and failure probabilities sum to 1. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
Green (single zero)	2.7027027%	36x grossGross return (includes stake)	2.7027027%	-0.02702703 units per 1 staked	Same 37-pocket reference; only zero wins green. A 35:1 net quote is 36x gross, not 35x gross or 14x gross. Success returns 36x gross; failure returns 0. Success and failure probabilities sum to 1. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
One specified number	2.7027027%	36x grossGross return (includes stake)	2.7027027%	-0.02702703 units per 1 staked	Same 37-pocket reference; select one number before the spin. Exactly one pocket wins. Success returns 36x gross; failure returns 0. Success and failure probabilities sum to 1. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.
One dozen or column	32.43243243%	3x grossGross return (includes stake)	2.7027027%	-0.02702703 units per 1 staked	Same 37-pocket reference; select exactly 12 numbers. This is a reference wager, not a claim that every demo offers it. Success returns 3x gross; failure returns 0. Success and failure probabilities sum to 1. All payouts are gross (stake-inclusive). EV is player net per 1 unit staked; house edge = -EV. Decimals are rounded only for display.