Free interactive tools to help you understand the mathematics behind casino games. Calculate expected losses, convert between RTP and house edge, and make informed decisions. Our calculators are based on established probability and statistics principles, aligned with industry standards used by testing agencies like Gaming Laboratories International (GLI).
Calculate the mathematical advantage casinos have over players. Understand expected losses, convert between RTP and house edge, and estimate session costs based on playing time.
Calculate odds and probabilities for various gambling outcomes. Convert between decimal, fractional, and American odds. Understand winning/losing streaks mathematically.
Run Monte Carlo simulations to visualize how variance affects your bankroll over time. Understand risk of ruin, optimal bet sizing, and why short-term results can vary wildly.
Calculate optimal bet sizes using the Kelly Criterion formula. Learn how professional bettors and investors determine the mathematically optimal wager size based on edge and odds.
Calculate the true cost of casino bonuses before accepting them. Understand wagering requirements, expected loss while clearing, and whether a bonus actually has positive mathematical value.
Calculate combined odds, potential payouts, and true probability for parlay (accumulator) bets. Understand why the house edge compounds with each leg and make informed decisions.
Calculate whether a bet has positive or negative expected value (EV). This fundamental metric tells you if a wager is mathematically profitable over time—the key to smart betting.
Compare betting odds from multiple bookmakers to find the best value. Calculate implied probabilities, identify potential arbitrage opportunities, and understand which source offers optimal returns.
Calculate pot odds, required equity, and convert outs to win probability using the Rule of 4 and 2. Determine if calling is mathematically profitable based on fundamental poker math.
Test popular betting systems like Martingale, Fibonacci, D'Alembert, and Paroli with Monte Carlo simulations. Watch in real-time as these strategies inevitably fail against the house edge.
Practice perfect blackjack basic strategy with instant feedback. Test your knowledge of hit, stand, double, split, and surrender decisions against every dealer upcard.
Analyze any roulette bet type with exact odds, payouts, and expected value calculations. Compare European vs American roulette to understand the mathematical impact of variant selection.
Visualize how slot machine RTP and volatility work together to create wildly different short-term outcomes. Run simulations to understand why session results vary dramatically.
Calculate your probability of going broke based on win rate, bet size, and bankroll. This essential bankroll management tool helps you understand the mathematical risk in your gambling approach.
Calculate optimal betting unit sizes for disciplined bankroll management. Compare flat betting vs percentage staking, set confidence-based stakes, and build a structured betting approach.
Plan your gambling sessions mathematically. Calculate how long your bankroll will last, set session budgets, compare entertainment costs, and understand the true hourly cost of play.
Calculate the bookmaker's vig (juice/margin) and discover true fair odds. Understand how much sportsbooks take on every bet and find no-vig lines for any market.
Calculate optimal hedge bets to lock in guaranteed profits or minimize losses. Perfect for futures bets, parlays, and any situation where you want to secure winnings.
Compare any two Texas Hold'em hands to see exact win percentages. Monte Carlo simulation calculates precise equity for any matchup, including with board cards.
Calculate your theoretical loss and estimated comp value based on your play. Understand how casinos evaluate players and what your gambling activity is worth in rewards.
See the expected value of every blackjack decision—hit, stand, double, split, or surrender—for any hand. Understand exactly why basic strategy is mathematically optimal.
Analyze Player, Banker, and Tie bet mathematics. Calculate commission impact, expected value, and compare side bet odds for baccarat's lowest house edge bets.
Designed to help you understand gambling mathematics, not encourage gambling.
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Understand volatility, hit frequency, and how RTP works in slot games.
MathematicsThe mathematical proof behind why no betting system can overcome the house edge.
StrategyLearn the mathematically optimal way to play every blackjack hand.
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