Red or Black in Roulette: Odds and Payout
Red or black is the bet everyone understands in five seconds: pick a color, get paid even money if the ball lands on it. It is a fair place to start. It is not a coin flip. On an American wheel, 18 of the 38 pockets are red, so you win 47.37% of the time, and that gap is the whole business model.
How the bet works
Put a chip on the red diamond or the black diamond in the outside section of the layout. If the ball lands on any number of your color, you win 1:1: a $10 bet returns your $10 plus $10. Land on the other color, or on 0 or 00, and the chip goes to the house.
| Bet | Pays | Pockets that win | Win chance | House edge (American) | House edge (European) |
|---|---|---|---|---|---|
| Red | 1:1 | 18 of 38 | 47.37% | 5.26% | 2.70% |
| Black | 1:1 | 18 of 38 | 47.37% | 5.26% | 2.70% |
Why the green pockets are the whole story
Eighteen red, eighteen black, and then 0 and 00 in green. If the wheel had only the 36 numbers, red or black would be a true 50/50 and even money would be a fair price. The two green pockets are what tilt it. You are paid as if there were 36 pockets while the ball can land in 38. The difference works out to 5.26% of every dollar bet, on average, over time. That figure is not a bad-luck streak. It is the price of the bet, and it is identical for every standard wager on the table (see the full payout chart).
A worked session
Say you bet $10 on red for 100 spins. The average expectation is about 47 wins and 53 losses, which nets out to a loss of roughly $53 for the hour. Some nights you walk away up $150; others you drop $200. The variance is large, which is why it feels like a fair fight in the moment. The bankroll calculator will show you the spread.
The one move that actually changes the odds
Find a single-zero wheel. A European wheel has no 00, so the same red bet wins 48.65% of the time and the edge falls to 2.70%. Some single-zero tables also run the la partage rule, which returns half your even-money bet when the ball hits zero, cutting the edge on red or black to about 1.35%. Nothing you do with chip placement comes close to that. Read American vs European roulette before your trip, and ask the floor which wheels they run.
Red-or-black betting systems
Doubling after a loss (Martingale) feels like it must work on a near-50/50 bet. It rearranges when you win and when you lose; it cannot move the 5.26%. One long streak of black, and there are always long streaks, runs into the table maximum or your bankroll first. We ran the numbers in do roulette betting systems work.
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Frequently Asked Questions
What are the odds of red or black in roulette?
On an American double-zero wheel, red wins 18 of 38 spins (47.37%). On a European single-zero wheel it is 18 of 37 (48.65%). Neither is 50%, because the green zero pockets are neither red nor black.
What does red or black pay?
Even money, 1:1. Bet $10, win $10 and keep your original $10.
Is red or black the best bet in roulette?
It has the same house edge as every other standard roulette bet: 5.26% on an American wheel, 2.70% on a European one. It is the lowest-variance bet, so your money lasts longer per spin, but it is not better value. The only real improvement is choosing a single-zero wheel, ideally with la partage (about 1.35% on even-money bets).
Is 0 red or black?
Neither. The 0 (and the 00 on American wheels) is green, and every red, black, odd, even, high, and low bet loses when the ball lands there. That is the entire source of the house edge on those bets.