Free calculators and comparison tools built on real keno mathematics. No guesswork — exact probabilities from the hypergeometric formula.
Calculate the exact probability of hitting any number of matches from any spot count. See both "exactly k matches" and "k or more matches" with 1-in-X odds format.
Enter your bet size and spot count to see a full payout breakdown — expected value per match count, total RTP, and house edge. Compare multiple paytables side by side.
Side-by-side analysis of 4-spot, 6-spot, 8-spot, and 10-spot keno. Compare jackpot odds, winning probability, RTP, and variance. Includes an interactive spot picker slider.
See exactly how the same bet pays differently at Massachusetts, Ohio, Oregon, Michigan, Las Vegas, and online casinos — side by side with best-payout highlights.
Find out exactly what keno costs per hour — based on your bet, venue type, games per hour, and session length. Includes a side-by-side comparison with slots.
All probability calculations use the hypergeometric distribution — the mathematically correct model for keno. We compute results in log-space to handle the extremely large numbers involved (C(80,20) exceeds 3.5 quadrillion) without floating-point errors.
Paytable data is sourced from publicly available lottery and casino information. Always verify current paytables with your state lottery or casino before playing.