Keno Explained: How It Works, the Odds, and What It Really Costs
Keno is a lottery-style casino game: pick up to 10 numbers from 80, watch 20 get drawn, and get paid by how many you catch. The rules take a minute; the house edge deserves a closer look.
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The short answer
How does keno work? It's a lottery-style game: you pick numbers from a field of 80, a machine draws 20 at random, and you're paid by how many of your picks it catches. It's one of the easiest casino games to learn and one of the most expensive to play. Wizard of Odds surveys put live casino keno's house edge at 20% to 35%.
What is keno?
Keno is a numbers game built around a single repeating draw: 20 numbers pulled at random from a pool of 1 through 80. You bet on which numbers will come up, and your prize depends on how many of your picks land among the 20. Think of it as a lottery drawing that runs every few minutes instead of twice a week.
People sometimes file it next to bingo, but the two differ in one key way. In bingo you're handed a card and wait for it to fill. In keno you choose your own numbers, your stake, and how many draws they ride. It's a lottery where you control the shape of the ticket, if not the outcome.
You'll find the same core game in four homes: casino keno lounges, video keno machines, state lottery screens in bars and restaurants, and online casinos running software versions. The rules barely change between them. The pace and the paytables change a lot, which is why we compare lottery keno vs casino keno in its own piece.
And it's not a niche game. In fiscal year 2025, WBUR reported that Massachusetts keno sales set a record above $1.285 billion, roughly 22% of everything the state's lottery sold that year. Ohio alone sells the game at more than 1,400 locations, per the Ohio Lottery. One quiet monitor game in bars and bowling alleys outsells most of the flashier draws around it.
How does keno work?
Every keno bet is your numbers, your stake, and one draw. You mark the numbers you want to play (your "spots"), pay for the ticket, and wait for 20 numbers to be drawn. Each drawn number that matches one of yours is a "catch," and the paytable pays you based on how many spots you played and how many you caught. For the full vocabulary, our keno terms glossary has the regulatory definitions.
The frame is the same everywhere. Per the Maryland Lottery's game rules, keno is played "using a field of numbers from one to 80," and you may choose up to ten of them. A central computer draws 20 numbers every three and a half minutes. Casinos widen the menu: most accept tickets of 1 through 20 numbers, per Wikipedia's overview of the game.
So the choices that define your ticket are:
- How many spots. One number up to the venue's maximum. More spots mean bigger top prizes, but sweeping them all gets dramatically rarer.
- How much per game. Usually $1 and up. Prizes scale with the wager.
- How many games. One draw, or the same numbers across many consecutive draws on a single multi-game ticket.
Casinos layer fancier ticket types on top: way tickets, king tickets, and combination tickets bundle several bets onto one slip by grouping your numbers. They're bookkeeping, not better odds. Every combination inside still faces the same math, and the glossary defines each type properly.
Two conveniences worth knowing. If you don't care which numbers you play (and mathematically you shouldn't, more on that below), a quick pick lets the terminal choose for you. And paytables reward different catch counts at different spot levels; on some big tickets, even catching nothing pays a consolation.
To get a feel for the spots-versus-catches trade-off, take a 5-spot ticket. Wild Academy computed the exact odds (2026): you'll catch all five about once in 1,551 draws, four about once in 83, and three about once in 12. Roughly 90% of the time you'll catch two or fewer, which typically pays nothing at this ticket size. That's the shape of keno everywhere: frequent near-misses, occasional mid-size hits, and a top prize you shouldn't plan around.
That's the concept. If you want the literal at-the-counter walk-through, filling out the bet card, handing it in, checking results, claiming wins, we cover it start to finish in how to play keno.
Keno formats at a glance
Same game, four very different speeds:
- Live lounge keno. The classic casino version: paper tickets, a keno writer at the counter, numbered balls or an RNG on a big board, one game every several minutes. Runners will even carry your ticket from the restaurant.
- Video keno. A slot-style machine where you tap your numbers on screen and set your own pace. That pace can be hundreds of games an hour, which changes the cost math completely.
- Lottery keno. State-run draws on monitors in bars and restaurants. The Virginia Lottery, for example, draws 20 numbers every four minutes with wagers of $1 to $10 per draw.
- Online keno. Software versions at licensed online casinos, drawn by a random number generator the instant you click. How that's tested, and what "provably fair" adds, is the subject of online keno RNG fairness.
Pace is the variable that matters most across these formats. A lottery draw every four minutes works out to about 15 games an hour, and a live lounge runs at a similar crawl. Video and online keno move at whatever speed you press the button, which can be twenty times faster. Same $1 ticket, wildly different hourly spend, a point we'll come back to in the verdict below.
There are also spin-off games layered on this base: extra-ball features, multipliers, bonus draws. We sort those out in keno variants explained, and we compare the formats head-to-head, including cost per hour, in video keno vs live vs online.
What does a keno ticket cost?
The sticker price is small: most keno tickets start at $1 per game, and state lotteries cap single-game wagers between $10 and $20. Here's the menu at five big US lottery keno games, per the official game pages of the Maryland, Ohio, Massachusetts, Virginia, and Oregon lotteries as of mid-2026:
Lottery | Spots you can play | Wager per game | Add-ons |
|---|---|---|---|
Maryland | 1-10 | $1 to $20 | Bonus up to 10x, Super Bonus up to 20x; Packaged Keno To Go from $0.25/game in bundles |
Ohio | 1-10 | $1, $2, $3, $4, $5, $10, or $20 | Booster (2x-10x) costs an extra dollar per dollar wagered; 1-50 consecutive drawings |
Massachusetts | 1-12 | $1 to $20 | Keno Bonus multiplies 3x, 4x, 5x, or 10x; not offered on 10-12 spot tickets |
Virginia | 1-10 | $1 to $10 | Top prize $100,000; draws every 4 minutes |
Oregon | 1-10 | Up to $100 per ticket across 1-100 games | Multiplier 1x-10x; draws every 4 minutes |
Notice the pattern with multipliers: they're never free. Ohio's Booster doubles your ticket price outright. Others fold the cost into a reworked paytable. A multiplier changes the size and shape of your wins, not the underlying math of the game.
Long tickets spread the cost over time rather than shrinking it. Oregon sells up to 100 consecutive games on one ticket, and Maryland's Packaged Keno To Go bundles 20 to 100 games at $0.25 each. Convenient, but every game in the bundle carries the full house edge. A longer ticket is simply more wagers, purchased in advance.
The sticker price isn't the real cost, though. The real cost is the slice of every wager the game keeps on average, the house edge. You never see it printed on the ticket, but it's the number that decides what an evening of keno actually runs you.
Worked math: Wild Academy's calculation from the published prize structures (2026) puts typical state-lottery keno returns near 70 cents per $1, a house edge around 30%. At $1 per game and one draw every four minutes, that's about 15 draws and an expected cost of roughly $4.50 an hour.
Your actual night will land above or below that average, sometimes far above. But the expected cost is the honest sticker price. What each catch actually pays, and how to read a paytable before you buy, is covered in keno payout charts explained. How to size a budget for any of this lives in bankroll management 101.
What are your real odds of winning?
Any single number you pick has a 1 in 4 chance of being drawn, because 20 of the 80 numbers come out every game. But the odds of sweeping a whole ticket collapse fast as you add spots. Hitting all 10 on a 10-spot ticket is a 1 in 8,911,711 shot, per the Virginia Lottery's published odds.
That 1 in 4 gives you a handy rule of thumb: on average, you'll catch a quarter of whatever you play. Ten spots, expect two or three catches on a typical draw. The prizes live in the tail above that average, which is exactly why they're rare.
All keno probabilities come from one formula, the hypergeometric distribution:
P(k) = C(20,k) x C(60,n-k) / C(80,n)
In words: the chance of catching k of your n picks is the number of draws that cover exactly k of them, divided by all possible draws. Run it for the 10-spot jackpot and you get C(20,10) = 184,756 favorable pick combinations out of C(80,10) = 1,646,492,110,120 possible ones, which works out to 1 in 8,911,711. That 1.6-trillion figure sometimes circulates online as "the odds of winning keno." It isn't. It's the count of possible tickets, not the chance the draw covers yours.
Here's how the solid-catch odds scale by ticket size. Wild Academy computed these exactly from the formula above (2026):
Numbers picked | Odds of catching them all |
|---|---|
3 | 1 in 72 |
4 | 1 in 326 |
5 | 1 in 1,551 |
6 | 1 in 7,753 |
7 | 1 in 40,979 |
8 | 1 in 230,115 |
9 | 1 in 1,380,688 |
10 | 1 in 8,911,711 |
Each extra spot makes the clean sweep roughly five times harder, and that multiplier itself grows as tickets get bigger. For perspective, run the same formula on a perfect 20-spot casino ticket and it collapses to 1 in C(80,20). Wild Academy computed that as roughly 1 in 3.5 quintillion (2026); Wikipedia's overview quotes the same figure. No one has a plan for that.
To put 1 in 8,911,711 in time terms: at one draw every four minutes, someone betting every single draw, day and night, would expect one solid 10-spot hit roughly every 68 years. It happens to somebody eventually. It just isn't something you can plan a weekend around.
Small wins are common, though, which is what keeps the game feeling friendly. Virginia's published overall odds of winning any prize range from 1 in 2.8 to 1 in 16.6 depending on how many spots you play. Even catching zero on a 10-spot is only a 1 in 21.8 event. You'll almost always catch something; it just usually pays less than the ticket cost.
One instinct to retire early: the draw has no memory. Every game is an independent shuffle of all 80 numbers, so a number that "hasn't hit in ten games" still has exactly a 1 in 4 chance next draw, the same as one that just hit twice. Feeling like a number is due is normal. Betting like it is how the edge collects.
One more thing the math settles: which numbers you pick doesn't matter. As Wizard of Odds puts it, in a fair game "it makes no difference which numbers you choose." We take that claim apart, hot numbers, due numbers and all, in best keno numbers: myth vs math. And if you want every catch probability for every spot count in one place, that's the keno odds and probability table.
Is keno a good bet?
Judged purely on the math: no. Casino keno carries a house edge of 25% to 29% per Wizard of Odds' house-edge table, and Britannica independently pegs it at "about 25 percent." For comparison, here's where that sits among common casino games, from the same Wizard of Odds table (2026):
Game | House edge |
|---|---|
Blackjack (liberal Vegas rules, basic strategy) | 0.28% |
Video poker (full-pay Jacks or Better) | 0.46% |
Baccarat (banker bet) | 1.06% |
Roulette (single zero) | 2.70% |
Roulette (double zero) | 5.26% |
Slots | 2% to 15% |
Live casino keno | 25% to 29% |
Dollar for dollar, that means a wager on live keno costs around a hundred times more, in expectation, than the same wager on blackjack played by the chart. Both can fill an evening. Only one of them charges cents on the dollar for it.
The edge, by format
Field surveys tell the same story with more spread. Wizard of Odds' 2001 Las Vegas survey found live keno returning 65% to 80% of wagers, a 20% to 35% house edge. Its 2012 Laughlin survey found returns as low as 50% to 74%, and a 2008 San Diego survey of video keno machines found 84% to 95%. The American Casino Guide Book (2025) puts typical video keno edges at 5% to 15% and notes Nevada's legal floor: electronic gaming machines must return at least 75%. The same guide warns that the paytable, not the cabinet, sets the return; two adjacent video keno machines can pay differently. Wizard of Odds' overall verdict is blunt: keno odds are "about as bad as slot machines," and it steers players toward video poker or bingo instead.
We ran our own numbers too. In 2026, Wild Academy computed exact expected returns for the big state-lottery paytables using the hypergeometric formula above. Massachusetts' paytable is remarkably consistent, returning 69% to 70% on nearly every spot count. Ohio's runs near 65%, with its 9-spot the worst mainstream lottery keno bet we computed at 54.7% return, a 45% house edge. Across the states we checked, a $1 10-spot ticket returns roughly 57 to 69 cents on average. The full cross-format reconciliation, and why the same game can cost under 4% online and 35% in a lounge, lives in keno house edge. If "return" and "edge" are new terms, start with what is RTP.
What that costs in practice
So why does anyone play? Honestly: because the edge isn't the whole cost picture. Live keno is slow. One $1 ticket buys you several minutes of anticipation, so the expected loss per hour can undercut faster games with far better odds. The reverse trap is real too: video keno's friendlier 5% to 15% edge can cost more per hour than the lounge's 30%, because you might play twenty times as many games. Pace multiplies edge.
Online paytables muddy it further. Wikipedia notes online keno edges can drop below 4%, closer to normal casino territory, though that depends entirely on the paytable the operator loads. And the jackpot dream is real, even if the 1 in 8,911,711 odds aren't negotiable.
What can't help you is a system. No progression, pattern, or lucky-number method moves the edge by a single decimal. Keno betting systems and keno winning patterns: myth vs math both demonstrate that with worked numbers. Keno is a fine entertainment purchase if you price it honestly. As an investment, it's one of the worst offers on the floor, and it was never pretending otherwise.
A short history of keno
The story most players hear is that keno is over 2,000 years old, invented by Cheung Leung of the Han dynasty to fund an army. Proceeds, the story goes, later helped build the Great Wall of China. Charming, and unverified. Wikipedia's history notes the Chinese lottery "is not documented before 1847," when the Portuguese administration of Macao licensed lottery operators. So the honest framing is: legend dates it to Han-dynasty China; the documented record starts in 1847 Macao. The legend survives because it's a better story than a licensing decree, and plenty of casino brochures still print it as fact.
The game's Chinese roots are real either way. Per Britannica, the original game was called baige piao, "white pigeon ticket." Tickets carried the first 80 characters of the Qianziwen, the Book of a Thousand Characters, rather than numbers. The game crossed to the western United States with Chinese immigrants in the 1840s, spread along the railroad camps, and swapped characters for numbers around 1900. Even the modern name is a borrow: Britannica traces "keno" to the French quine, "group of five."
The American twist came in Nevada, where state lottery law made a numbers draw legally awkward. Britannica records that from 1933, Reno gambling houses ran the game as "Race-Horse Keno," printing horses' names instead of numbers on the tickets, a "race" rather than a lottery. Nevada changed its laws in 1951, the horses retired, and keno became the numbers game we know. That's also why casinos still call each keno game a "race," a term we unpack in the keno terms glossary.
Where should you go next?
This page is the map. Each branch below goes one level deeper.
Learn the game
How to play keno is the literal beginner walk-through: marking the bet card, wagers, multi-game tickets, checking results, claiming a win. Keep the keno terms glossary beside it for spots, catches, way tickets, kings, and races, defined from actual gaming regulations rather than forum lore.
Follow the math
Keno payout charts explained shows how a paytable turns catches into prizes and how to compare two charts before you buy. The keno odds and probability table lists the exact probability of every catch count for every ticket size. Keno house edge puts it together: what the game really costs, format by format.
Pressure-test the myths
Best keno numbers: myth vs math handles hot, cold, and due numbers. Keno winning patterns: myth vs math covers the card-pattern folklore. Keno betting systems runs the popular staking systems against a 25%-plus edge and shows the arithmetic doing the debunking.
Choose your format
Video keno vs live vs online compares pace, paytables, and expected cost per hour. Keno variants explained sorts the extra-ball and multiplier spin-offs. Lottery keno vs casino keno explains why the bar-monitor version pays differently than the lounge, and online keno RNG fairness covers how digital draws are tested and verified.
Whichever branch you follow, set your budget before your first ticket. Bankroll management 101 is the ten-minute read that makes every other page here cheaper, and our responsible gambling and bankroll course turns it into a habit.
Play it smart: live keno keeps roughly 20 to 35 cents of every dollar wagered, so treat it as slow-paced paid entertainment with a fixed budget, and never chase a 1-in-8.9-million jackpot with money you'd miss. This article is education, not financial or gambling advice. 18+/21+ depending on your jurisdiction.
Try the calculator
Want to see the exact odds for your ticket? Our keno odds calculator computes the probability, payout, and house edge for any ticket from 1 to 10 spots.
Sources
- Wizard of Odds — Keno — retrieved July 2026
- WBUR — Mass. lottery sales down after record year — retrieved July 2026
- Ohio Lottery — KENO — retrieved July 2026
- Maryland Lottery — Keno — retrieved July 2026
- Wikipedia — Keno — retrieved July 2026
- Virginia Lottery — Keno — retrieved July 2026
- Massachusetts Lottery — Keno How To Play — retrieved July 2026
- Oregon Lottery — Keno — retrieved July 2026
- Wizard of Odds — House Edge of Casino Games Compared — retrieved July 2026
- Encyclopaedia Britannica — Keno — retrieved July 2026
- American Casino Guide Book — Beginners Guide to Playing Keno — retrieved July 2026
Frequently asked questions
What is keno and how does it work?
Keno is a lottery-style game played on a field of 80 numbers. You pick your numbers (usually 1 to 10 at lotteries, up to 20 at many casinos), the game draws 20 at random, and every drawn number matching one of yours is a "catch." A paytable then pays you based on how many spots you played and how many you caught. Draws repeat every few minutes.
Is keno a good bet compared to other casino games?
By the math, no. Wizard of Odds puts live casino keno's house edge at 25% to 29%, versus 0.28% for blackjack with basic strategy and 5.26% for double-zero roulette. Keno's one saving grace is pace: live games run every few minutes, so a small budget lasts. The edge itself is among the worst in the building, and no system changes it.
How much does a keno ticket cost?
Most tickets start at $1 per game. State lotteries cap single-game wagers between $10 and $20 (Maryland, Ohio, and Massachusetts allow $1 to $20; Virginia $1 to $10), and bundled options like Maryland's Packaged Keno To Go drop to $0.25 per game. The truer cost is the house edge: on a typical lottery paytable, a $1 ticket costs roughly 30 cents per draw on average.
Can you win real money playing keno?
Yes, keno pays real cash prizes, and small wins are common: Virginia Lottery's published odds of winning any prize range from 1 in 2.8 to 1 in 16.6 depending on spots played. The headline jackpots are another matter. Catching all 10 numbers on a 10-spot ticket is a 1 in 8,911,711 shot, and most small wins pay less than the ticket cost.
What should a beginner know before playing keno?
Three things. First, number choice doesn't matter: every combination has identical odds in a fair game. Second, the house edge is steep, roughly 20% to 35% at live keno per Wizard of Odds' surveys, so treat every ticket as entertainment spending. Third, pace multiplies cost: video keno can run hundreds of games an hour. Set a fixed budget before your first ticket and stop when it's gone.
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Provably Fair & Payments Writer
Devon covers the technical side of crypto: how blockchains reach consensus, provably fair verification, seeds and hashes, and how deposits and withdrawals actually move — from casino approval to network confirmations.
