Box Plot Maker
Turn a list of numbers into a box-and-whisker plot (box plot) — the classic statistical summary that shows the median, quartiles, range, and outliers at a glance. Paste your data, and the tool computes the five-number summary (min, Q1, median, Q3, max), the interquartile range (IQR), Tukey fences, and whiskers that extend to the most extreme points within 1.5×IQR, flagging any points beyond as outliers. Everything runs locally in your browser.
Data
Box plot
Summary
A box plot summarizes a distribution with five numbers: the minimum, first quartile (Q1), median, third quartile (Q3), and maximum. The box spans Q1 to Q3 (the middle 50%, the interquartile range or IQR) with a line at the median; whiskers extend out to the most extreme data points within 1.5×IQR of the box (the adjacent values); and any points beyond are drawn as individual outlier dots. Quartiles use linear interpolation between order statistics (the inclusive / type-7 method used by R, NumPy, and Excel's QUARTILE.INC). With IQR=0 (e.g. all values equal, or n=1) the fences collapse and no points are flagged. Pairs with the Histogram, Statistics Calculator, and Percentile tools. Everything runs locally — nothing leaves your browser.