Calculatorism

Quartile Calculator

Compute Q1, Q2 (median) and Q3 of a data set.

Input Data

Data

Results

First quartile (25%).
3
Second quartile (median).
5
Third quartile (75%).
7
Quartile summary.
4
Explanatory note about the result.
Q1=3, Q2(中位數)=5, Q3=7；IQR=4。

At a glance:Quartiles divide sorted data at 25/50/75%; Q2 is the median; IQR = Q3−Q1. Complements iqr and percentile.

Formula

Q1 = 25th percentile, Q3 = 75th percentile.

How to Use

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

Case Studies

1..8

Q1=2.75, Q2=4.5, Q3=6.25.

FAQ

Interpolation method?

Uses linear interpolation between order statistics (common in box plots).

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:Quartile Calculator（/math/quartile）。