🎲 Core Probability (10)
Probability Calculator
Calculate complement, union, intersection, and conditional probability of events.
Conditional Probability & Bayes' Theorem
Calculate posterior probability using Bayes' Theorem: P(A|B) from prior, likelihood, and false positive rate.
Combinatorics Calculator
Calculate permutations (nPr), combinations (nCr), and factorials for counting problems.
Expected Value Calculator
Calculate expected value, variance, and standard deviation from a probability distribution.
Binomial Distribution Calculator
Calculate binomial probabilities P(X=k), P(X≤k), P(X≥k), plus mean and variance.
Normal Distribution Calculator
Calculate z-scores and probabilities from the normal distribution using Abramowitz & Stegun approximation.
Poisson Distribution Calculator
Calculate Poisson probabilities for event counts given an average rate λ.
Standard Deviation Calculator
Enter a dataset to calculate mean, median, mode, range, variance, standard deviation, and coefficient of variation.
Odds Converter
Convert between decimal, fractional, American, and implied probability odds formats. Calculate house edge.
Dice Probability Calculator
Calculate exact probabilities for dice rolls using dynamic programming. Supports any number of dice and sides.
♠️ Poker (10)
Pot Odds Calculator
Calculate pot odds, equity needed, and whether to call or fold based on your outs.
Preflop Hand Equity Calculator
Compare two starting hands to see win, tie, and lose percentages preflop.
Poker Outs Calculator
Count your outs and calculate the probability of completing your hand on the turn, river, or both.
Implied Odds Calculator
Calculate implied odds and expected value when drawing, factoring in future expected winnings.
ICM Calculator
Calculate Independent Chip Model equity for tournament poker. Convert chip stacks to dollar values using Malmuth-Harville.
Poker Expected Value Calculator
Calculate the expected value of betting, checking, or folding based on fold equity and win probability.
Poker Variance Calculator
Calculate expected profit, confidence intervals, downswing risk, and bankroll requirements.
Poker Hand Probability Calculator
See the probability of being dealt any specific starting hand in Texas Hold'em. Based on C(52,2) = 1,326 combinations.
Poker Range Calculator
Select hands from a 13x13 grid to build a preflop range and see what percentage of all combos it represents.
Tournament ROI Calculator
Track your poker tournament results: ROI, profit/loss, ITM rate, average cash, and hourly rate.
⚽ Sports Betting (10)
Parlay Calculator
Calculate parlay/accumulator payouts across multiple legs with any odds format.
Arbitrage Calculator
Find arbitrage opportunities and calculate optimal stake distribution for guaranteed profit.
Hedge Bet Calculator
Calculate the optimal hedge bet to lock in profit or minimize losses.
Kelly Criterion Calculator
Calculate optimal bet sizing using the Kelly Criterion for maximum long-term bankroll growth.
Vig/Juice Calculator
Calculate the bookmaker's margin (vig/juice/overround) and find true no-vig odds.
Closing Line Value Calculator
Track your closing line value (CLV) to measure long-term betting edge.
True Odds Calculator
Remove the vig to find true odds using multiple devigging methods.
Dutching Calculator
Calculate stakes to spread across multiple selections for equal profit regardless of which wins.
Betting ROI Tracker
Track your betting performance with ROI, yield, win rate, and expected value calculations.
Break-Even Win Rate Calculator
Find the minimum win rate needed to break even at given odds, and analyze loss streak probabilities.
🎰 Casino Games (10)
House Edge Calculator
Calculate house edge, player return, and expected loss for popular casino games and bet types.
Blackjack Expected Value Calculator
Find the optimal play for any blackjack hand with EV for hit, stand, double, split, and surrender.
Craps Bet Analysis Calculator
Analyze any craps bet: house edge, true odds, probability, payout, and expected loss.
Roulette Expected Value Calculator
Calculate probability, payout, house edge, and expected value for any roulette bet.
Baccarat Commission Calculator
Analyze baccarat bets: house edge, outcome probabilities, commission impact, and optimal strategy.
Slot Machine RTP Calculator
Analyze slot machine return to player, expected loss, variance, and probability of winning.
Card Counting Converter
Convert running count to true count, estimate player edge, recommended bets, and strategy deviations.
Keno Probability Calculator
Calculate exact keno probabilities for any number of spots. Full probability table with odds and pay tables.
Video Poker Return Calculator
Calculate theoretical return for any video poker pay table. Compare variants and find the best games.
Lottery Odds Calculator
Calculate exact lottery odds for any format. Compare Powerball, Mega Millions, EuroMillions, and custom lotteries.
💰 Bankroll Management (10)
Risk of Ruin Calculator
Calculate the probability of losing your entire bankroll given your edge and bet sizing.
Bankroll Requirements Calculator
Calculate the minimum bankroll needed for a given edge and acceptable risk of ruin.
Session Probability Calculator
Calculate the probability of winning, expected profit, and variance ranges for a playing session.
Stop-Loss Calculator
Analyze optimal stop-loss amounts and their impact on your expected value.
Optimal Bet Sizing Calculator
Calculate Kelly Criterion and compare bet sizing strategies for optimal bankroll growth.
Bankroll Growth Projector
Project your bankroll growth over time with compounding vs flat betting comparison.
Drawdown Probability Calculator
Calculate the probability of experiencing various drawdown levels from your bankroll peak.
Unit Size Calculator
Calculate your optimal betting unit size based on bankroll and risk tolerance.
Staking Plan Comparison
Simulate and compare different staking strategies: Flat, Percentage, Kelly, Fibonacci, and Martingale.
Time to Target Calculator
Calculate how long it will take to reach a bankroll target and the probability of getting there.
📊 Advanced Statistics (10)
Chi-Squared Goodness of Fit Test
Test whether observed frequencies differ from expected
Confidence Interval Calculator
Calculate confidence intervals for means and proportions
Sample Size Calculator
Determine the required sample size for your study
Linear Regression Calculator
Fit a line to data points using least squares
Correlation Calculator
Compute Pearson r and Spearman rank correlation with p-values
Monte Carlo Simulator
Run thousands of simulations to estimate probability distributions
Central Limit Theorem Demonstrator
Visualize how sample means approach normality regardless of population shape
Hypothesis Test Calculator
Perform z-tests, t-tests, and proportion tests with reject/fail decisions
Geometric Distribution Calculator
Probability of first success on the k-th trial
Hypergeometric Distribution Calculator
Probability of drawing successes without replacement