Statistics calculators

Probability, sampling, and descriptive statistics made readable.

Means, medians, standard deviations, confidence intervals, and sample size planning — with formulas and worked examples for each tool.

Calculators

Statistics / Descriptive

Calculates sample covariance Cov(X,Y) = [ΣXY − (ΣX)(ΣY)/n] / (n−1) and population covariance / (n). Also shows the sign...

basic

16,517 4.8 1 min

Statistics / Descriptive

Computes the OLS regression slope b₁ = [nΣXY − ΣXΣY] / [nΣX² − (ΣX)²] and intercept b₀ = (ΣY − b₁ΣX) / n from five summa...

basic

24,778 4.7 1 min

Statistics / Descriptive

Compute the range (max − min), along with the minimum, maximum, and count of a list of numbers.

basic

22,914 3.9 1 min

Statistics / Descriptive

Calculates the number of standard deviations (z-score) that a value X is from the mean, and the raw score from a given z...

basic

23,037 4.3 1 min

Statistics / Descriptive

Compute the percentile rank of a chosen value within a list of numbers — the percentage of values that fall at or below...

basic

12,041 3.9 1 min

Showing 25 to 29 of 29 results

About this category

Means, medians, standard deviations, confidence intervals, and sample size planning — with formulas and worked examples for each tool.

Missing a calculator in Statistics? We'd love to hear what to build next.