How this calculator works
Enter the values for value, rate (%) and review the units before calculating.
Formula / method
Quartiles use linear interpolation at 25%, 50% and 75%.
Worked example
For 1, 2, 3, 4, 5, Q1 = 2, median = 3 and Q3 = 4.
Assumptions and limitations
Quartiles use the same inclusive linear interpolation convention as the percentile tool.
Quartile conventions vary slightly between statistical packages.