Quartile Calculator – Q1, Q2, Q3, IQR
Calculate quartiles and interquartile range for data analysis
Table of Contents
How to Use
- Enter your dataset as comma or space-separated numbers
- Click calculate to find quartiles
- View Q1, Q2 (median), Q3, and IQR
- See sorted data and range
What are Quartiles?
Quartiles divide a dataset into four equal parts. Q1 (first quartile) is the 25th percentile, Q2 (second quartile) is the median or 50th percentile, and Q3 (third quartile) is the 75th percentile.
Frequently Asked Questions
- What is IQR?
- The Interquartile Range (IQR) is the difference between the third quartile (Q3) and the first quartile (Q1). It measures the spread of the middle 50% of the data and is useful for identifying outliers.