Quartile Calculator

Calculate quartiles and interquartile range from a six-value data set.

InputsChange a value to recalculate instantly

Value 1

Value 2

Value 3

Value 4

Value 5

Value 6

ResultUpdates as you type

Q17.25

Median9

Q310.75

IQR3.5

Five-number range4 … 15

How it worksTransparent math

FormulaIQR=Q3−Q1

Calculates quartiles and interquartile range using linear interpolation on ordered observations.

Result breakdownSee the important numbers together

1Q17.25

2Median9

3Q310.75

4IQR3.5

5Five-number range4 … 15

λ DooMathWork with this calculation

Local · deterministic · optional

auto_awesome

Quick mathNatural-language-style shortcuts for deterministic arithmetic.

Calculator guide

How to use the Quartile Calculator

Calculate quartiles and interquartile range from a six-value data set.

01Set inputsChoose values, units and assumptions.

02Apply the modelIQR = Q3 − Q1

03Read the resultCheck the output against the assumptions before using it.

menu_book

Calculate quartiles and interquartile range from a six-value data set.

functions

IQR = Q3 − Q1

fact_check

Review the inputs, units and assumptions before using the result for a real decision.