Calculatorism

Interquartile Range (IQR) Calculator

Compute Q1, Q3 and the IQR from a number series.

Input Data

Numbers

Results

Computed interquartile range.
4
Explanatory note about the result.
Q1=3、中位=5、Q3=7；IQR=4。

At a glance:IQR = Q3 − Q1; Q1 is the lower quartile, Q3 the upper quartile (linear interpolation). Complements quartile, range and standard-deviation calculators.

Formula

IQR = Q3 − Q1.

How to Use

  1. Enter comma-separated numbers.
  2. The tool returns Q1/Q2/Q3 and the IQR.

Case Studies

1..9 → Q1=3, Q3=7, IQR=4

Median 5; Q1=3, Q3=7.

FAQ

How does this differ from quartile?

Quartile reports the quartiles; this emphasizes the IQR spread.

Related Tools

References

Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:Interquartile Range (IQR) Calculator（/statistics/iqr）。