Quartile Calculator
Calculate Q1, Q2 (median), Q3, and understand your data distribution instantly.
💡 Enter numbers separated by commas. Values are automatically sorted before calculation.
Quartiles: —
Quartiles divide ordered data into four equal parts.
Example 1 (Odd Dataset)
Dataset: 4, 7, 10, 15, 18
Q1 = 7
Q2 (Median) = 10
Q3 = 15
IQR = Q3 − Q1 = 8
Example 2 (Even Dataset)
Dataset: 2, 4, 6, 8, 10, 12
Q1 = 4
Q2 (Median) = 7
Q3 = 10
IQR = 6
Formula
Q2 = Median
IQR = Q3 − Q1
Quartiles are calculated after sorting the dataset.
What does this quartile calculator do?
It calculates the first quartile (Q1), median (Q2), third quartile (Q3), and interquartile range (IQR).
Why calculate quartiles?
Quartiles help understand distribution, detect outliers, and build box plots in statistics.
Frequently Asked Questions
What is Q2?
Q2 is the median of the dataset.
What is IQR?
IQR (Interquartile Range) measures the spread of the middle 50% of data.
Does this calculator handle unsorted data?
Yes. Values are automatically sorted.
Can quartiles be decimals?
Yes. Results may be fractional depending on the dataset.