Quartile
Free Quartile calculator with clear step-by-step results.
About Quartile
Q1, Q2 and Q3 summarise a distribution's spread.
Formula
Formula
Quartiles split the sorted data into four equal parts
Worked example
With the default values below, Quartile returns Q1 of 3.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Values (comma-separated)
- 1, 3, 5, 7, 9, 11, 13
Results
- Q1
- 3.00
- Q2 (median)
- 7.00
- Q3
- 11.00
Step by step
- 1Values used
- 2Formula
- 3Q1= 3.00
- 4Q2 (median)= 7.00
- 5Q3= 11.00
Assumptions and limits
- The result is derived only from the single input listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How does this calculator work?
Q1, Q2 and Q3 summarise a distribution's spread.
Why does this matter?
Method varies slightly between definitions.