Casino & Gambling Calculators

Baccarat Odds Calculator

Calculate the house edge for Banker, Player, or Tie baccarat bets from published 8-deck shoe probabilities and standard payouts.

Bankroll Management Calculator

Calculate a suggested bet size from your bankroll and a fixed risk percentage per bet, with a sustainable-bets reference figure.

Betting Odds Converter

Convert betting odds between American, decimal, and fractional formats, with the implied win probability shown for each conversion.

Blackjack Odds Calculator

Calculate the exact probability of busting on the next card for any blackjack hand total, computed from a full 52-card deck's rank composition.

Craps Odds Calculator

Calculate the exact probability that a craps point rolls before a seven, for any point number, computed from dice combinatorics.

House Edge Calculator

Calculate the exact house edge of any wager from its win probability and payout, using the standard expected-value formula casinos rely on.

Kelly Criterion Calculator

Calculate the Kelly Criterion optimal bet fraction from decimal odds and an estimated win probability, for mathematically sizing a wager.

Progressive Jackpot Odds Calculator

Calculate the expected value of a progressive jackpot play and the break-even jackpot size from win probability and cost per play.

Roulette Odds Calculator

Calculate win probability and house edge for any roulette bet on a European or American wheel, from numbers covered and payout odds.

Slot Machine RTP Calculator

Calculate expected return and expected loss on any total wagered from a slot machine's published Return to Player percentage.

Every Casino Game Has a Number the House Doesn't Advertise

Behind every casino game sits a house edge — the built-in percentage that guarantees the casino profits over enough bets, regardless of any individual outcome. These calculators surface that number directly for popular games, along with the bankroll math serious players use to manage risk against it.

Popular Casino & Gambling Calculators

Ten tools cover odds, edge, and bankroll strategy:

  • House Edge Calculator — computes the built-in casino advantage for a given game and bet type.
  • Slot Machine RTP Calculator — translates a slot's return-to-player percentage into expected long-run loss per session.
  • Kelly Criterion Calculator — sizes bets as a fraction of bankroll based on perceived edge and odds, minimizing risk of ruin.
  • Roulette Odds Calculator — calculates payout odds and house edge across single and double-zero wheels.
  • Bankroll Management Calculator — sets a per-bet sizing plan designed to survive normal losing streaks.

Why House Edge Guarantees Long-Run Losses, Not Every Session

House edge is a statistical average over a huge number of bets, not a per-session guarantee — a player can walk away up after one night at even a high house-edge game like American roulette (5.26% edge), because variance in any single session can easily outweigh the underlying edge. Over thousands of bets, though, the law of large numbers takes over and actual results converge toward the theoretical edge, which is exactly why casinos are consistently profitable even though individual gamblers regularly win.

Frequently Asked Questions

Which common casino games have the lowest house edge?
Blackjack played with optimal basic strategy and baccarat's banker bet are typically among the lowest, often under 1.5%, compared to many slot machines that can run well into double digits.

What does the Kelly Criterion actually solve for?
It calculates the bet size that maximizes long-run bankroll growth given a real edge and known odds — betting more than the Kelly fraction increases risk of ruin without improving long-run growth, and it isn't designed for negative-edge casino games.

Explore More

Interested in card-specific odds? See the Card Game Calculators, or check lottery probability in the Lottery Calculators.