6-Sided Dice Probability Calculator
Calculate exact probabilities for rolling 6-sided dice — sums, specific values, at-least-one conditions, and repeated trial outcomes with distribution tables.
Free Probability Calculators
25 toolsProbability, permutation, combination, and Bayes theorem calculators. Browse our free probability tools below — no sign-up required.
AND Probability Calculator
Calculate the probability of two or three events both occurring — independent or dependent — with breakdowns, odds, and repeated trial analysis.
Bayes' Theorem Calculator
Apply Bayes' theorem to update probabilities with new evidence — compute posterior probability, likelihood ratios, and confusion matrices for medical tests.
Beta Distribution Calculator
Compute PDF, CDF, mean, mode, variance, and percentiles for the beta distribution with interactive shape parameter presets and visual curve.
Binomial Distribution Calculator
Calculate binomial probabilities, cumulative distribution, mean, variance, and confidence intervals for any number of trials and success probability.
Birthday Paradox Calculator
Calculate the surprising probability that two or more people in a group share a birthday — with tables, visual bars, and customizable year length.
Central Limit Theorem Calculator
Explore the Central Limit Theorem — compute standard error, z-scores, confidence intervals, and see how sample size affects the sampling distribution.
Coin Flip Probability Calculator
Calculate the probability of getting a specific number of heads or tails in coin flips — exact, cumulative, streaks, and distribution tables.
Conditional Probability Calculator
Calculate P(A|B) and P(B|A) from joint, marginal, or conditional inputs — with contingency tables, independence tests, and lift analysis.
Exponential Distribution Calculator
Compute PDF, CDF, percentiles, and reliability statistics for the exponential distribution with interactive rate parameter and visual density curve.
Hypergeometric Distribution Calculator
Calculate exact hypergeometric probabilities for sampling without replacement, with PMF, CDF, distribution tables, and binomial approximation comparison.
Implied Probability Calculator
Convert American, decimal, and fractional betting odds to implied probability with EV analysis, Kelly criterion, edge visualization, and vig breakdown.
Joint Probability Calculator
Calculate joint, union, and conditional probabilities for two events, with contingency tables, Venn diagram visualization, lift analysis, and repeated-event chains.
Lognormal Distribution Calculator
Compute PDF, CDF, percentiles, and moments for the lognormal distribution with interactive density curve, percentile table, and properties reference.
Monty Hall Problem Calculator
Explore the Monty Hall problem with analytical probabilities and Monte Carlo simulation for 3+ doors, variable reveals, and strategy comparison visuals.
Negative Binomial Distribution Calculator
Calculate negative binomial probabilities — failures before the r-th success — with full distribution table, visual chart, and parameter sensitivity analysis.
Normal Distribution & Sampling Calculator
Compute normal distribution probabilities, z-scores, and sampling distributions with visual comparison of population vs sample mean curves and confidence intervals.
OR Probability Calculator
Calculate P(A or B) for mutually exclusive, non-exclusive, and three-event scenarios with stacked probability bars, comparison tables, and repeated-trial analysis.
Post-Test Probability Calculator
Calculate post-test probability from sensitivity, specificity, and prevalence with likelihood ratios, confusion matrix, sequential testing, and PPV/NPV sensitivity analysis.
Probability Fraction Calculator
Convert probability fractions to decimals, percentages, and odds. Simplify fractions, combine probabilities, compute binomial distribution over trials, and view equivalent fractions.
Probability of Three Events Calculator
Calculate combined probability of three events using inclusion-exclusion. Supports independent and dependent events with Venn diagram regions, conditional probabilities, and repeated trials.
Two Dice Probability Calculator
Calculate two-dice probabilities for sums, doubles, products, and differences. View complete sum distribution, outcome grid, cumulative probabilities, and custom-sided dice support.
Uniform Distribution Calculator
Calculate probabilities, percentiles, and statistics for continuous and discrete uniform distributions. Includes PDF/CDF visualization, quantile table, order statistics, and sampling distribution.
Venn Diagram Calculator
Calculate Venn diagram regions for 2 or 3 sets. Find unions, intersections, complements, conditional probabilities, Jaccard similarity, and all exclusive regions with visual diagrams.
Weibull Distribution Calculator
Calculate Weibull distribution PDF, CDF, survival, hazard rate, MTTF, percentiles, and B-life. Supports reliability analysis with shape and scale parameters plus mission time planning.