Quartiles Calculator


Given a data set of real numbers x1, x2, x3 ... xN , this calculator sorts the data values in ascending order, and computes the quartiles Q1, Q2 and Q3 and the interquartile range IQR defined by

IQR = Q3 - Q1


Use Quartiles Calculator

Enter the data set as a list of real numbers x1, x2, x3 ... xN separated by commas then press "Calculate Quartiles" and check the data entered. The outputs are:
  • the entered data (for checking)
  • the sorted data and the number of data values (count)
  • the quartiles and interquartile range .
"NaN" means "not a number" and when it is displayed for a data value, check that data value and make corrections before any calculations.
Enter Data Values: x1, x2, x3 ... =
Decimal Places =

Check Entered Data: =

Sorted Data: =

Count: =

Quartile (1): =
       Quartile (2) (median): =         Quartile (3): =
Interquartile range IQR: =

More References and Links

Quartiles and box plots
Box Plots Calculator and Grapher
Statistics Calculators, Solvers and Graphers.