A straight-up roulette bet covers one number and pays 35 to 1 if that exact number wins. On a European wheel, the chance is 1 out of 37, or 2.70%. On an American wheel, it is 1 out of 38, or 2.63%. The payout is exciting, but the bet is high variance and still negative expectation.
Quick Facts
- A straight-up bet covers exactly one pocket.
- Standard payout is 35 to 1.
- European probability: 1/37 = 2.70%.
- American probability: 1/38 = 2.63%.
- True odds are 36 to 1 on European roulette and 37 to 1 on American roulette.
- The payout stays 35 to 1, which creates the house edge.
- This is one of the swingiest common roulette bets.
Plain Talk
A straight-up bet is the classic “my number” roulette bet. You place chips directly on one number in the inside betting area. If the ball lands on that number, the dealer pays 35 units profit for every 1 unit bet. Your original chip is also returned after the payout is settled.
The emotional appeal is obvious. A small chip can become a large payout. The mathematical warning is just as obvious: almost every spin misses.
This page is about the one-number bet only. For every bet type together, read roulette bets explained. For the full probability table, use roulette odds and roulette odds chart.
How It Works
A straight-up bet wins if one exact pocket wins.
| Wheel | Total pockets | Winning pockets | Probability | Standard payout |
|---|---|---|---|---|
| European | 37 | 1 | 2.70% | 35 to 1 |
| American | 38 | 1 | 2.63% | 35 to 1 |
| French single-zero | 37 | 1 | 2.70% | 35 to 1 |
The Wizard of Odds roulette basics page lists standard roulette bets and payouts, including straight-up bets. Public rules such as the Nevada roulette rules of play and Massachusetts roulette rules show how roulette wagers are placed and resolved on regulated layouts.
True odds versus payout
This is where the bet becomes clear.
| Wheel | True odds against hitting one number | Casino payout | Difference |
|---|---|---|---|
| European | 36 to 1 | 35 to 1 | Casino keeps 1 unit of true value |
| American | 37 to 1 | 35 to 1 | Casino keeps 2 units of true value |
A fair European straight-up bet would pay 36 to 1. The casino pays 35 to 1. That one-unit shortfall over 37 possible outcomes is the 2.70% house edge.
A fair American straight-up bet would pay 37 to 1. The casino still pays 35 to 1. That two-unit shortfall over 38 outcomes is the 5.26% house edge.
Roulette Table Example
A player bets 2 units straight-up on number 17.
| Outcome | What happens | Net result |
|---|---|---|
| Ball lands on 17 | Bet wins at 35 to 1 | +70 units profit |
| Ball lands on any other European pocket | Bet loses | -2 units |
| Ball lands on 0 | Bet loses unless 0 was the chosen number | -2 units |
| Ball lands on 00 on American wheel | Bet loses unless 00 was the chosen selection | -2 units |
Now look at 37 theoretical European spins with one hit and 36 misses:
| Result group | Spins | Net per spin | Total |
|---|---|---|---|
| One win | 1 | +35 units | +35 |
| Thirty-six losses | 36 | -1 unit | -36 |
| Net | 37 | -1 unit |
That -1 unit over 37 units wagered is 2.70%.
From the Casino Side:
Straight-up betting is easy to understand but demanding to deal when the table is busy. Many players stack chips across several numbers, neighbors, finals, and favorite combinations. The dealer must read exact chip position, separate player color chips, clear losers without disturbing winning stacks, and pay from the top down correctly.
Surveillance watches inside action carefully because tiny chip movements can change a losing bet into a winning-looking bet. Past posting, unclear chip placement, late reaching, and disputes often live in the inside betting area.
For the casino, straight-up betting is not scary because of the payout. The game is priced for it. A 35-to-1 payout looks large, but the misses fund the wins.
Common Mistakes
- Thinking a favorite number has a better chance because it “feels lucky.”
- Forgetting that 35 to 1 is not true odds on any standard wheel.
- Betting too many single numbers and accidentally creating a large total bet.
- Calling a near miss meaningful because the ball landed next to the chosen number on the wheel.
- Using birthdays and covering only 1–31 while ignoring that the wheel does not care.
- Chasing the same number after it misses repeatedly.
- Confusing a high payout with a high-value bet.
Hard Truth
A straight-up bet is not expensive because it usually loses. It is expensive because when it finally wins, the casino still pays less than the true odds.
FAQ
What is a straight-up bet in roulette?
It is a bet on one exact number. The chip goes directly on that number on the layout.
How much does a straight-up roulette bet pay?
The standard payout is 35 to 1. A 1-unit winning bet earns 35 units of profit, plus the original stake is returned.
What are the odds of hitting one number in roulette?
European roulette: 1/37, or 2.70%. American roulette: 1/38, or 2.63%.
Is a straight-up bet worse than red or black?
It has higher variance. On the same standard wheel, the house edge is usually the same as most other roulette bets. The ride is different, not magically cheaper or more expensive.
Why does the bet pay 35 to 1 instead of true odds?
Because that short payout is how the casino earns its edge. True odds would be 36 to 1 on European roulette and 37 to 1 on American roulette.
Can I cover many straight-up numbers?
Yes, but each number is another bet. Covering 10 numbers with 1 unit each is a 10-unit spin, not a small 1-unit idea.
Is betting zero straight-up different?
The payout is normally the same: 35 to 1. Zero is just another pocket for straight-up purposes, but it is the pocket that makes many outside bets lose.
Deeper Insight
Straight-up betting exposes a key roulette lesson: probability and payout are separate. Players feel the payout. The casino prices the probability.
On a European wheel, one number wins once every 37 spins on average, not on schedule. That phrase matters. “On average” does not mean you should expect one hit inside every neat block of 37 spins. You may hit twice quickly. You may miss 100 times. The long-term average is not a short-term promise.
Straight-up bets also create memory traps. If number 17 has not appeared for two hours, players start calling it due. But each new spin still gives number 17 one pocket out of the wheel. The wheel does not owe a correction.
The bet is fine as entertainment when priced honestly in your head. It is dangerous when the player treats the payout as evidence that the bet is powerful.
Formula / Calculation
P(straight-up win) = 1 / Total Pockets
Expected Value = (Probability of Win × Net Win) - (Probability of Loss × Stake)
House Edge = -Player EV / Initial StakeEuropean example for a 1-unit straight-up bet:
P(win) = 1/37
P(loss) = 36/37
EV = (1/37 × 35) - (36/37 × 1)
EV = 35/37 - 36/37
EV = -1/37 = -2.70%American example:
P(win) = 1/38
P(loss) = 37/38
EV = (1/38 × 35) - (37/38 × 1)
EV = 35/38 - 37/38
EV = -2/38 = -5.26%Formula Explanation in Plain English
You win big once in a while and lose small most of the time. On a fair European wheel, the one big win would need to cover 36 losing outcomes. The casino pays only 35. On an American wheel, it would need to cover 37 losing outcomes. The casino still pays only 35.
Related Reading
Use the roulette guide for the full course, then read roulette odds and roulette payouts to compare this bet with others. The roulette house edge page explains why the same wheel price appears across many bets. Next, compare this one-number bet with split bet odds and inside vs outside bets. To test your own numbers, use the roulette odds calculator and expected loss calculator.