How it works
The data are sorted first. Q2 is the median; Q1 and Q3 are the medians of the lower and upper halves. IQR = Q3 − Q1.
Descriptive statistics
Quartile and Interquartile Range Calculator
Paste your values separated by spaces, semicolons or line breaks to reveal the five-number summary and possible outliers.
Your resultIQR 12.5
Interquartile range: Q3 − Q1.
Min4
Q17
Median12
Q319.5
Max24
47791215182124
- Q1
- 7
- Median (Q2)
- 12
- Q3
- 19.5
- Full range
- 20
- Possible outliers
- None
Understanding your result
The middle 50% of the data lies between Q1 and Q3. A small IQR indicates concentrated central values; a large IQR indicates greater dispersion.
Last verified:
03FAQ
Frequently asked questions
It measures the spread of the middle 50% of a dataset and is less sensitive to extreme values than the full range.