Keno Odds Calculator
Select spots on an 80-number grid and instantly see exact match probabilities, expected payouts, and house edge for every keno configuration.
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Select Spots
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Results
Select 1-20 numbers on the grid to see odds and payouts
RTP by Spot Count
Compare return-to-player across different spot selections using standard payouts.
| Spots | RTP | House Edge | Top Payout |
|---|---|---|---|
| 1-Spot | 75.00% | 25.00% | 3x |
| 2-Spot | 90.19% | 9.81% | 15x |
| 3-Spot | 86.03% | 13.97% | 42x |
| 4-Spot | 79.65% | 20.35% | 120x |
| 5-Spot | 94.91% | 5.09% | 800x |
| 6-Spot | 92.67% | 7.33% | 1.6K x |
| 7-Spot | 96.80% | 3.20% | 7.0K x |
| 8-Spot | 96.86% | 3.14% | 25.0K x |
| 9-Spot | 91.45% | 8.55% | 40.0K x |
| 10-Spot | 93.54% | 6.46% | 100.0K x |
| 11-Spot | 92.06% | 7.94% | 170.0K x |
| 12-Spot | 93.12% | 6.88% | 320.0K x |
| 13-Spot | 91.98% | 8.02% | 600.0K x |
| 14-Spot | 92.03% | 7.97% | 990.0K x |
| 15-Spot | 91.70% | 8.30% | 1.8M x |
Understanding Keno Odds
How Keno Works
In Keno, 20 numbers are drawn from a pool of 80. Players select 1-20 spots (numbers) before the draw. Payouts depend on how many of your selected spots match the 20 drawn numbers. The game runs continuously, with new draws every few minutes in most casinos.
Keno Odds Explained
Keno probabilities use hypergeometric distribution: C(spots, matches) × C(80 - spots, 20 - matches) / C(80, 20). The odds of matching all numbers increase dramatically with more spots. Hitting 20/20 is approximately 1 in 3.5 quintillion. Most payouts begin at matching 3-5 numbers.
Best & Worst Spot Counts
Mathematically, 4-8 spot games tend to offer the lowest house edge (often 20-30%). Picking more spots increases variance enormously but reduces expected return. Single-spot keno often has the best return percentage (around 75%), while 15-20 spot games can have a house edge exceeding 35-40%.
Keno vs Other Casino Games
Keno typically has a house edge of 20-35%, making it one of the highest-edge games in the casino. For comparison: blackjack is 0.5-2%, craps 1.4%, roulette 2.7-5.3%, slots 2-15%. Keno's appeal is the lottery-like jackpot potential from small wagers, not its expected return. Always play Keno for entertainment, not profit.
Take Your Edge Further
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