Quartile Calculator
Q1/Q2/Q3 via percentile engine; IQR = Q3 − Q1.
Limitation: Educational box-plot statistics.
How to Use the Quartile Calculator
Q1/Q2/Q3 via percentile engine; IQR = Q3 − Q1.
Open the Quartiles calculator and read field labels.
Match the mode
Educational box-plot statistics.
What It Calculates
Q1/Q2/Q3 via percentile engine; IQR = Q3 − Q1.
Worked Examples
Linear quartiles
Inputs
Result
IQR = Q3 − Q1 in details.
Simple set
Inputs
Result
Method documented.
Nearest rank
Inputs
Result
May differ from linear.
Check your mode
Educational box-plot statistics.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorFormulas
Standard definitions with assumptions noted below.
Formula
Scientific Background
Standard statistics definitions with assumptions stated on-page. Educational only—not professional certification.
Sources & review
Quartile Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 22, 2026
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