Keno: Rules, Odds and How to Play

Keno is a lottery-style game you can play at a casino lounge, a bar terminal, a state lottery counter or online. You pick numbers from a field of 80, the game draws 20, and you get paid on how many of your picks come up. Learning the rules takes about a minute.

The price is the part worth your attention. Keno charges more per dollar wagered than almost anything else on a casino floor, and the gap between the worst and best paytables is wider than in any other common game. That gap — not your numbers — is the only thing you control.

How to play keno, step by step

A keno round works the same way whether the balls come out of a physical hopper or a certified random number generator, per the rules summarised by the Wizard of Odds and CasinoBeats.

1. Choose your game and check the paytable first. The paytable is printed on the ticket or shown on screen. It lists what each catch level pays for each spot count. Two machines side by side can pay differently. 2. Pick your spots. The grid runs 1 to 80. Most games let you pick between 1 and 10 numbers; some allow up to 15 or 20. Each number you pick is a "spot". 3. Set your stake. Payouts scale with the wager, so a $2 ticket pays double a $1 ticket on the same paytable. 4. Start the draw. The game selects 20 numbers at random from the 80. 5. Count your catches. Every one of your spots that appears in the 20 drawn numbers is a "catch". 6. Get paid by the paytable row. A 5-spot ticket catching 4 pays the "5 spots, catch 4" row. Catching fewer than the minimum pays nothing, which is most tickets.

The three ticket types you will see:

• Straight ticket. One set of numbers, one draw. This is the default and the only one a new player needs.
• Multi-race ticket. The same numbers played across several consecutive draws — 5, 10 or 20 in a row. It saves time and nothing else.
• Way ticket. Numbers grouped into overlapping sets so one ticket contains several bets at once. It costs more per ticket because it is several tickets.

Multipliers, bonus balls and branded variants (Caveman Keno, Cleopatra Keno, Power Keno and dozens more, all catalogued by the Wizard of Odds) sit on top of this core. They change the shape of the payouts, not the structure of the game.

Why your keno numbers do not matter

There are 3,535,027,396,898,400 different ways to draw 20 balls from 80. Every one of them is equally likely, and every individual ball has a 1 in 80 chance of appearing on any given draw. The Wizard of Odds is blunt about the popular myth here: legitimate keno games are fair, and it makes no difference which numbers you choose.

Birthdays, last week's "cold" numbers, diagonal patterns on the grid — all identical in value. The draw has no memory, and no tracking sheet changes a fixed probability.

What does change your odds is how many spots you pick, because that decides which row of the paytable you are buying.

If you want the math: the chance of catching exactly k of your N picks is the hypergeometric probability

`P(k) = C(N, k) × C(80 − N, 20 − k) / C(80, 20)`

where `C(n, r)` is the number of ways to choose r items from n. The three pieces count the ways to hit k of your numbers, the ways to fill the rest of the draw from numbers you did not pick, and the total number of possible draws. You can skip it and use the table below.

Probabilities are the hypergeometric values for 20 balls drawn from a field of 80. They are fixed by the structure of the game and identical at every venue.

Two numbers from that table are worth sitting with. An 8-spot player catches between 0 and 4 numbers 97.9% of the time. A 10-spot player hits all ten roughly once in nine million tickets.

What a 5-spot keno ticket pays, worked out

Probability alone does not tell you the cost. You need the paytable attached to it. Here is a representative casino 5-spot paytable on a $1 bet, with the expected return derived from the probabilities above.

Payouts are representative of common casino 5-spot paytables and are quoted as total return on a $1 wager. Your local paytable is the final word — check it before you play.

Add the three lines and a dollar wagered returns about 75.1 cents over the long run. That is a house edge near 24.9%.

Three things fall out of that arithmetic:

• Most tickets pay nothing. You need 3 catches to win on this paytable, and 3-or-better happens about 9.7% of the time. Roughly nine in ten 5-spot tickets are dead.
• The top prize carries the return. The catch-5 row alone supplies 52 cents of the 75 cents. Trim the jackpot and the whole return collapses.
• The same ticket at a lottery counter is worse. KenoSpots puts a typical lottery 5-spot top prize at $640 against the casino's $810, dropping the return to around 63%.

That last point is the mechanism behind every bad keno game. Operators do not change the odds — they cannot — so they cut the payout on the row that does the heavy lifting.

Why keno costs 20–35% when blackjack costs 1%

Keno sits at the expensive end of the building, and it is not close. The comparison below uses figures compiled by Gambling101 alongside our 5-spot derivation.

Edges vary by rules and paytable; the keno range reflects the spread between generous and stingy paytables rather than any single game.

Over $100 of action, that is roughly $1 lost at a blackjack table against $20 to $35 at keno. The Wizard of Odds' own advice for players who like the numbers is to move to video poker, and for live keno players to move to bingo — a game with a similar rhythm and a far lower price.

Pace decides what that edge costs per hour. A bar terminal running one draw every four minutes gives you about 15 draws an hour; at $1 a draw against a 25% edge, that is roughly $3.75 an hour in expected losses — genuinely cheap entertainment. Video keno runs at slot-machine speed, and the Wizard of Odds rates its odds about as bad as slots. Same edge, many times more draws, a completely different bill at the end of the night.

Where you play changes your return more than what you pick

This is the decision that moves real money. The identical game — 80 numbers, 20 balls — returns wildly different amounts depending on the counter you stand at.

Survey figures are dated and paytables change. Treat these as the shape of the market, not a quote on the machine in front of you.

Even within one category, the same bet prices differently. KenoSpots' state-by-state comparison of the 5-spot top prize on a $1 base game shows Massachusetts, Pennsylvania and Connecticut at $450, Ohio at $410, California's Hot Spot at $435, Georgia at $400, and New York and Maryland at $300. Identical odds, a 50% swing in the prize that carries the return.

The practical version of all this:

• Read the paytable before you sit down. It is the price tag, and it is public.
• Compare the row you actually intend to play. A game can be generous at 4 spots and mean at 8.
• Assume nothing carries over between venues. Bar keno, casino lounge keno, lottery keno and online keno are separate products.
• Ignore multiplier add-ons when comparing. Those prices are quoted on the base game; extras are a separate bet.

How many spots should you pick?

There is no single correct answer, and the two sane approaches point in different directions.

The frequency approach favours low spot counts, 3 to 5. On the representative 5-spot paytable above, about one ticket in ten pays something. Wins are small, sessions last longer and the swings are mild. Picking 4 spots gives you a catch-4 roughly once in 326 tickets — rare, but something a regular player will actually see.

The lottery approach favours 8, 9 or 10 spots. You accept long dry stretches for a shot at a prize worth remembering: a $1 wager catching 8 of 8 on a representative paytable returns $15,000, and 10 of 10 returns $100,000. The cost is that 97.9% of 8-spot tickets land in the 0-to-4 range and pay nothing.

Both are defensible because neither changes the house edge much on its own. What decides it is the paytable quality at that spot count, which is why the Wizard of Odds names spot count and venue as the only two skills the game contains.

A reasonable way to choose:

• Want the session to last? Play the lowest spot count your paytable treats decently and the smallest stake the game allows.
• Want the jackpot dream? Play high spot counts, but treat the ticket as a lottery purchase with a known 20%+ price, not as a bet you expect to grind back.
• Want the best return? Run each spot count's paytable through the expected-value arithmetic shown above and take the highest. That is genuine work for a game this expensive, which is the Wizard of Odds' own wry point about keno analysts.

Which keno strategies are real, and which are folklore?

Folklore first, because there is a lot of it.

• Hot and cold numbers. Draws are independent. A number that came up five times yesterday is exactly as likely today.
• Due numbers. Same error, opposite direction. Nothing is owed to you.
• Pattern picking. Corners, diagonals, consecutive runs — identical probability to any other selection of the same size.
• Way tickets as an edge. Grouping numbers creates more bets on one slip. Each of those bets carries the same house edge as it would alone.
• Multi-race as an edge. It queues up draws. It does not price them differently.

The real levers are unglamorous:

• The paytable you choose, worth 20 percentage points or more of return.
• The spot count, which selects which paytable rows you are buying.
• The stake and the number of draws, which together set your total exposure.
• Stopping, which is the only action that reliably ends a session at a chosen number.

One more thing that is verifiable rather than assumed: online keno results come from a certified random number generator, and on crypto-native sites you can often check each draw yourself. Our guide to provably fair systems covers how that verification works. Fairness and price are separate questions — a perfectly fair keno game with a 30% edge is still a 30% edge.

The honest read

Keno is a fair game at a bad price. The math is fixed and public, nothing you do to your numbers moves it, and the return you get is decided almost entirely before you touch the grid — by which paytable you happened to stand in front of. On a representative casino 5-spot ticket that is about 75 cents back on the dollar; the worst live surveys have found 50 cents, the best online games are quoted near 95.

If you enjoy the rhythm — pick, wait, watch the balls — play it slowly, on the best paytable you can find, for money you have already written off. If you are trying to make the money last, nearly every other game on the floor treats you better. And if a keno session ever stops feeling like entertainment, our responsible gambling guide lists the support available in most regions.

For how keno's price compares with every other game under the same roof, start with our guide to betting at the casino.