Statistics Calculators

51 free, browser-based statistics calculators — covering descriptive stats, hypothesis testing, regression, probability, and distributions. Every calculator shows step-by-step solutions with formula breakdowns, so you can check your work or learn the method, not just get a number.

No installation, no account, no download required. Use the search or category filters below to find the right calculator instantly.

51 calculators 6 categories Step-by-step solutions Works on any device
Most popular

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Descriptive statistics

Learn descriptive stats → 12 calculators

Probability

Learn probability → 11 calculators

Hypothesis testing

Learn hypothesis testing → 9 calculators

Distributions

Learn distributions → 9 calculators

Regression & correlation

Learn regression → 3 calculators

Applied & clinical statistics

7 calculators

Frequently asked questions

For a full dataset summary, use the Descriptive Statistics Calculator — it covers mean, median, mode, SD, variance, quartiles, and kurtosis in one tool. For comparing two group means, use the T-Test Calculator. All 51 calculators on this page are free, browser-based, and require no account or download.
Use Descriptive Statistics for a single dataset. Use T-Test for two group means. Use ANOVA for three or more groups. Use Chi-Square for categorical data. Use Pearson Correlation for linear relationships. Not sure? Try the statistical test selector.
Enter comma-separated values into the Standard Deviation Calculator. It calculates both population (σ) and sample (s) SD with a full step-by-step breakdown. For a complete summary including quartiles and IQR, use the Descriptive Statistics Calculator instead.
Use a z-test when the population standard deviation is known (usually n ≥ 30). Use a t-test when the SD is unknown and estimated from the sample — which is most real-world situations. See our full guide: t-test vs z-test.
Yes. All 51 calculators are fully responsive and work on phones, tablets, and desktops with no app download or account required. Results appear instantly as you enter data.