Tools

Descriptives Calculator

Paste numbers and get the full descriptive rundown: mean, SD, median, quartiles, confidence interval, skewness, outlier flags, and a picture. Nothing leaves your browser, and the APA-style summary sentence writes itself.

Your data: numbers separated by spaces, commas, or new lines (decimal point, not comma)

n—

Mean—

SD (sample)—

SE—

95% CI of the mean—

Median—

Q1 – Q3 (IQR)—

Min – Max—

Skewness—

Outliers (1.5×IQR rule)—

What to check before you trust the mean

Skewness far from 0? The mean is being dragged toward the tail, so report the median too. (Describing Data)
Outliers flagged? Don't delete them by reflex; find out what they are first. One typo can move a mean more than ten honest values. (Assumptions & When They Break)
Small n? The 95% CI here uses the t-distribution, so it's honest about small samples. No formula fixes n = 5, though. (Confidence Intervals)

Privacy note: everything on this page runs locally in your browser. Your data is never uploaded anywhere, so paste away.

Two variables instead of one? The Correlation & Regression Calculator plots X against Y and gives you r, the best-fit line, and an outlier check. No data yet? Grab a practice dataset.