5 Number Summary Calculator

Your details

Enter your numbers separated by commas, spaces, or semicolons. Decimals and negative numbers are accepted.
Inclusive uses linear interpolation and matches Excel QUARTILE.INC. Exclusive (Tukey) drops the median from both halves before computing Q1 and Q3.
Q1 (First Quartile)
8

25th percentile - 25% of values fall at or below this point

Minimum3
Median (Q2)15
Q3 (Third Quartile)21
Maximum30
IQR (Interquartile Range)13
Range27
Count (n)9
Outliers (1.5 x IQR rule)None detected
Sorted data3, 7, 8, 12, 15, 18, 21, 25, 30
Minimum3
Q18
Median15
Q321
Maximum30

Five-number summary for 9 values: 3, 8, 15, 21, 30

  • The median (15) sits close to the midpoint of Q1 and Q3, suggesting a roughly symmetric distribution.
  • The middle 50% of values (IQR = 13) spans 48% of the total range (27).
  • No outliers were detected using the standard 1.5 x IQR rule.

Next stepUse this summary as the basis for a box-and-whisker plot, or pair it with mean and standard deviation for a fuller picture of your distribution.

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