Use this calculation to reproduce a defined quantitative method when the observations, units, sampling process, and assumptions match the method shown here.

Values

Required list.

The cited overview of Interquartile range supplies background for the terminology and domain context used by this tool.^[1]

Calculate Q3 minus Q1 with the inclusive median-of-halves quartile method. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Interquartile range

Returned number.

• A numerical result does not by itself establish data quality, causation, representativeness, independence, distributional fit, or practical significance.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Inspect the underlying data, visualize its distribution, report uncertainty and sample size, and compare the result with a robust or domain-specific method where appropriate.

• Quartile Deviation Calculator

  Calculate the semi-interquartile range, half the distance between the inclusive third and first quartiles.

• Quartiles Calculator

  Calculate Q1, the median (Q2), and Q3 with the inclusive median-of-halves method.

• Inclusive Quartiles Calculator

  Calculate Q1, Q2, and Q3 by including the median in both halves of an odd-sized dataset.