Gratuit online quartile calculator. Calculer first quartile (Q1), median (Q2), third quartile (Q3), interquartile range (IQR), and five-number summary from any data set. Paste numbers and get instant results with step-by-step explanation.
Separate numbers with commas, spaces, or new lines
Ceci quartile calculator computes the five-number summary (min, Q1, median, Q3, max) and interquartile range (IQR) from any data set. It uses the standard Tukey's hinges method: the data is sorted, the median (Q2) is found, then Q1 is the median of the lower half and Q3 is the median of the upper half. Tout calculations happen instantly in your browser — no server, no delay, no data sent anywhere. Perfect for students, teachers, data analysts, and anyone working with descriptive statistics.
Quartiles are values that divide a data set into four equal parts. Q1 (first quartile) is the 25th percentile — 25% of data falls below it. Q2 (second quartile) is the median — 50% of data falls below it. Q3 (third quartile) is the 75th percentile — 75% of data falls below it. Together with the minimum and maximum, they form the five-number summary.
The interquartile range (IQR) is Q3 minus Q1. It represents the spread of the middle 50% of your data and is a robust measure of variability that is not affected by outliers. A larger IQR indicates more variability in the central portion of the data.
Oui! Copier cells from Excel or any spreadsheet and paste them directly. The tool accepts comma, space, tab, and new line separators.
Absolutely. Tout calculations happen inside your browser. Nothing is sent to any server.