A high/low bet is a roulette outside bet on a number range. Low means 1 through 18. High means 19 through 36. The bet pays even money when correct, but zero and double zero are not in either range, so they normally beat both sides.
Plain Talk
High/low is not about whether the number feels high or low. It is two fixed boxes on the roulette layout: 1–18 and 19–36.
Like red/black and odd/even, it covers 18 numbers and pays 1:1. The problem is the green pocket. The range does not include zero.
| Term | Plain-English meaning | Where it appears | Why it matters |
|---|---|---|---|
| Low | Numbers 1–18 | Outside layout | Covers half of the numbered sequence |
| High | Numbers 19–36 | Outside layout | Covers the other half |
| Zero | Outside both ranges | Wheel and layout | Creates a losing result |
| Double Zero | Extra green pocket on American roulette | American wheel | Raises the house edge |
Where You See It
High/low appears in the outside betting area. On some layouts, the boxes are labeled “1 to 18” and “19 to 36.” Dealers may call them low and high.
Why It Matters
High/low matters because it looks structured. Some players try to track whether the wheel is “favoring high numbers” or “favoring low numbers.” That usually turns into pattern hunting.
The range is real. The pattern prediction is not.
Example
You bet $25 on 19–36.
If the ball lands on 31, you win $25 profit. If it lands on 8, zero, or double zero, you lose your $25.
Nothing about a long run of low numbers forces a high result next.
From the Casino Side:
From the casino side, high/low is another quick-settling outside bet. It helps beginners participate without learning inside bet placement.
For table operations, high/low is simple: chips in the range box, result comes, dealer clears losing bets and pays winning bets. The operational concern is clean layout control and accurate payout, not complex strategy.
Common Misunderstanding
Players often believe high/low is safer because it divides the wheel into two clear halves. It divides the numbered results, not the whole wheel. Zero sits outside the division.
Another misunderstanding is thinking high/low has different odds from red/black. On the same wheel type, the house edge is the same for standard even-money bets.
Hard Truth
Hard Truth: High and low split the numbers neatly. They do not split the risk fairly.
Related Terms
FAQ
What numbers are low in roulette?
Low means 1 through 18.
What numbers are high in roulette?
High means 19 through 36.
Does zero count as low?
No. Zero is not low and not high.
What does high/low pay?
A winning high/low bet normally pays 1:1.
Is high/low a good roulette strategy?
It is a simple bet, not a strategy that beats the game.
Deeper Insight
High/low is useful for explaining how roulette separates coverage from edge. Covering more numbers increases hit frequency, but payout drops. The zero pocket keeps the expected value negative.
If you want to compare bet families, read Inside Bet, Outside Bet, and Dozen Bet.
Formula / Calculation
| Bet | Covers | Pays | Loses to | Standard house-edge driver |
|---|---|---|---|---|
| Low 1–18 | 18 numbers | 1:1 | 19–36 and zero | Zero pocket |
| High 19–36 | 18 numbers | 1:1 | 1–18 and zero | Zero pocket |
| High/low on American wheel | 18 numbers | 1:1 | Opposite range, zero, double zero | Zero and double zero |
Expected Value = (Probability of Win × Net Win) - (Probability of Loss × Stake)
Formula Explanation in Plain English
A high/low bet wins slightly less than half the time because zero is outside both ranges. American roulette makes the deal worse by adding double zero.
Related Reading
For the main rules, read Roulette. For related outside bets, read Red/Black Bet and Odd/Even Bet. For the casino math behind the range, continue with House Edge and Expected Loss. For safer gambling tools, see the UK Gambling Commission safer gambling guide.