Free online statistics calculator. Calculate mean, median, mode, standard deviation, variance, quartiles, range, and detect outliers. Step-by-step breakdown. No ads, instant results, pure client-side.
A comprehensive, free online statistics calculator for data analysis. Compute mean, median, mode, standard deviation, variance, quartiles, and detect outliers — all with step-by-step explanations. Perfect for students, researchers, data analysts, and anyone working with datasets. All calculations happen instantly in your browser.
Yes, completely free. No registration, no ads, no limits.
Population std dev uses N (all data), while sample std dev uses N-1 (subset estimate). Use population when you have all data, sample when working with a subset.
We use the 1.5 × IQR rule: any value below Q1 - 1.5×IQR or above Q3 + 1.5×IQR is flagged as an outlier.
Yes! Paste directly — commas, spaces, tabs, and new lines are all auto-detected.
Absolutely. All calculations happen inside your browser. Nothing is sent to any server.