Science cluster
Statistics & Probability Calculators
Run regression, hypothesis tests, confidence intervals, and probability distributions, and summarize data with means, variance, and percentiles.
Top calculators
A short starting set for the most common statistics & probability calculators workflows.
Beta Distribution Calculator – PDF, CDF, Mean, Variance & Mode
Use this beta distribution calculator to compute the PDF, CDF, mean, variance, and mode for Beta(a, b). Enter positive shape parameters a and b and a point x in [0, 1] to evaluate proportions, rates, and Bayesian priors.
Branching Process Extinction Probability Calculator
Estimate extinction probabilities and generation growth for Galton–Watson branching processes with configurable offspring distributions.
Student's t Distribution Calculator - PDF, CDF, and Quantiles
Compute PDF, CDF, survival probability, mean, variance, and quantiles for Student's t distribution with any degrees of freedom.
Binomial Distribution Calculator - Exact and Cumulative Probabilities
Calculate binomial probabilities instantly: exact P(X=k), cumulative P(X≤k), and tail P(X≥k) for n trials with success rate p. Includes PMF/CDF and common us...
Expected Value and Variance Calculator | Discrete Outcomes, Spread, and Long-Run Average
Enter outcome-probability pairs to calculate the expected value, variance, and standard deviation of a discrete random variable, with automatic normalization, worked examples, and a balancing mini-game.
Raffle Odds Calculator - Probability of Winning Prizes from Ticket Draws
Estimate your chances of winning in a raffle given total tickets, your tickets, and number of prizes. See the probability of 0, 1, 2+ wins plus the chance of at least one win.
Box and Whisker Plot Calculator | Five-Number Summary, Quartiles & Boxplot
Use this box-and-whisker plot calculator to enter a list of numbers, compute the five-number summary, find quartiles and IQR, and draw a boxplot directly in your browser.
Permutation and Combination Calculator - Count Possible Arrangements
Calculate permutations and combinations for any set size directly in your browser. Great for statistics students and anyone exploring probability.
All calculators in this cluster
Browse 19 calculators matched to this topic, or return to the Science category.
Absorbing Markov Chain Calculator (Fundamental Matrix, Absorption Probabilities)
Compute the fundamental matrix N=(I−Q)^{-1}, expected steps to absorption, and absorption probabilities for a 5×5 absorbing Markov chain.
Beta Distribution Calculator – PDF, CDF, Mean, Variance & Mode
Use this beta distribution calculator to compute the PDF, CDF, mean, variance, and mode for Beta(a, b). Enter positive shape parameters a and b and a point x in [0, 1] to evaluate proportions, rates, and Bayesian priors.
Binomial Distribution Calculator - Exact and Cumulative Probabilities
Calculate binomial probabilities instantly: exact P(X=k), cumulative P(X≤k), and tail P(X≥k) for n trials with success rate p. Includes PMF/CDF and common us...
Birthday Paradox Probability Calculator (Shared Birthday Odds by Group Size)
Calculate the probability that at least two people in a group share the same birthday. Use the classic birthday paradox calculator, review the formula, and try an optional mini-game that makes collision probability intuitive.
Blackjack Odds Calculator - Bust Probability and Strategy
Estimate your chance of busting on the next hit and get basic strategy hints with this blackjack odds calculator.
Boltzmann Factor Calculator - Statistical Weight of Energy States
Compute the Boltzmann factor e^(-E/kT) to evaluate the relative probability of a system occupying a higher energy state at a given temperature.
Box and Whisker Plot Calculator | Five-Number Summary, Quartiles & Boxplot
Use this box-and-whisker plot calculator to enter a list of numbers, compute the five-number summary, find quartiles and IQR, and draw a boxplot directly in your browser.
Branching Process Extinction Probability Calculator
Estimate extinction probabilities and generation growth for Galton–Watson branching processes with configurable offspring distributions.
Doppelgänger Encounter Probability Calculator - Estimate Look-Alike Odds
Approximate the chance of meeting someone who resembles you based on crowd size and the diversity of appearance traits.
Expected Value and Variance Calculator | Discrete Outcomes, Spread, and Long-Run Average
Enter outcome-probability pairs to calculate the expected value, variance, and standard deviation of a discrete random variable, with automatic normalization, worked examples, and a balancing mini-game.
Food Pantry Inventory Rotation Calculator (FIFO/FEFO) | Reduce Waste & Improve Safety
Plan food pantry inventory rotation using FIFO/FEFO. Estimate time to depletion vs. time to expiration using stock, donation rate, distribution rate, and a safety buffer to reduce waste and improve food safety.
Ground Sampling Distance Calculator - Resolve Mapping Precision
Calculate ground sampling distance (GSD) from sensor pixel size, focal length, and flight altitude to determine aerial photo resolution.
Hypergeometric Distribution Calculator - Sampling Without Replacement
Evaluate probabilities for draws without replacement from a finite population.
Library of Babel Search Probability Calculator
Estimate the chance of stumbling upon a specific phrase within Borges' Library of Babel.
Loot Drop Probability Calculator - Estimate Your Odds for Rare Items
Calculate the chance of receiving a rare loot drop in video games. Enter drop rate and number of attempts to see overall probability.
Permutation and Combination Calculator - Count Possible Arrangements
Calculate permutations and combinations for any set size directly in your browser. Great for statistics students and anyone exploring probability.
Raffle Odds Calculator - Probability of Winning Prizes from Ticket Draws
Estimate your chances of winning in a raffle given total tickets, your tickets, and number of prizes. See the probability of 0, 1, 2+ wins plus the chance of at least one win.
Roulette Odds Calculator | European vs American Wheel Probability & Expected Value
Calculate roulette win probability, loss probability, expected return, and house edge for common bets on European and American wheels. Includes a worked example and an optional roulette mini-game.
Student's t Distribution Calculator - PDF, CDF, and Quantiles
Compute PDF, CDF, survival probability, mean, variance, and quantiles for Student's t distribution with any degrees of freedom.