Statistics & Probability

23 free statistics & probability tools in the Calculators & Converters collection — every one runs in your browser with no signup and no uploads.

Calculate the probability of hitting target scores in darts.

Probability of drawing Lorcana cards in your opening hand

Match motor KV rating to the right propeller for your RC build

Hypergeometric odds for Pokémon card draws and combos

Odds your key cards are prized in a Pokémon game

Calculate real odds for RuneScape 3 loot drops over multiple attempts

Hypergeometric odds for Yu-Gi-Oh opening hands and combos

Convert a Z-score to a percentile rank and back.

Compute nCr, nPr, and factorials instantly in your browser.

Mean ± margin of error at 80–99% confidence.

Pearson r for two paired data series.

Complement, AND/OR for independent events, and Bayes.

Paste numbers and get mean, median, mode, range, variance, standard deviation, quartiles and sum instantly.

Sample and population standard deviation with a full step-by-step working table.

Compute nPr and nCr with a full factorial breakdown and exact big-number math.

Find the mathematically optimal bet size to maximise long-run bankroll growth.

Fit a least-squares line, get R², ANOVA table, residuals and predictions instantly.

Calculate exact, cumulative and range probabilities for any Poisson process.

Exact P(X = k), cumulative CDF and full distribution — with a bar chart.

Count multiset selections using the stars-and-bars formula.

Calculate Pearson r, R², regression line and scatter plot instantly.

Convert any z-score to a percentile — or find the z-score for any percentile.

Discover how quickly shared birthdays become probable in a group.