Quartile Calculator

A quartile is one of three points that divide a specific set of data into four equal groups. Each group is represented with 1/4 part of the distributed sampled population. The first quartile also written as Q1, the second quartile as Q2 and third quartile as Q3. Use the below online Quartile calculator to calculate q1, q2 & q3. To calculate the quartiles, enter the observed values in the below input box. Values must be numeric and separated by commas.

Q1, Q2, Q3 Calculator

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Quartile has points from zero to fourth quartile. This Quartile calculator finds First Quartile Q1(lower), Second Quartile Q2(median) and Third Quartile Q3(upper) values of the distributed sampled population.

Example:

Find the first, second and third quartile of : 1,3,2,6,8,9,10,5

Solution:

Arranging the data in ascending order : 1, 2, 3, 5, 6, 8, 9, 10
First, we need to find median.
Here, median = 5 + 6 / 2
= 5.5
Hence,Q2= 5.5

To find First Quartile,
find the mean of the last two values of the lower half data.
Lower half data = 1, 2, 3.
= 2 + 3 / 2
= 2.5

To find Third Quartile,
find the mean of the first two values of the upper half data.
Upper Half data = 8, 9, 10
= 8 + 9 / 2
= 17 / 2
= 8.5

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