Quartile Calculator
Q1, median, Q3 and five number summary.
Enter your values
Enter the data values you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Median (Q2)
- 23
- Minimum
- 4
- Q1
- 15
- Q3
- 47
- Maximum
- 60
- IQR
- 32
Quick answer
Quartiles split ordered data into four equal parts, with Q2 being the median.
At a glance
| What it does | Q1, median, Q3 and five number summary. |
|---|---|
| Category | Statistics |
| Inputs needed | Data values |
| Main output | Median (Q2) |
| Cost | Free — no sign-up, no download |
How to use the Quartile Calculator
- 1Paste your values separated by commas.
- 2The tool sorts them automatically.
- 3Read the five number summary.
Inputs explained
- Data values
- Enter the data values you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Data values4, 8, 15, 16, 23, 42, 47, 51, 60
Results
- Median (Q2)23
- Minimum4
- Q115
- Q347
- Maximum60
- IQR32
Frequently asked questions
Which quartile method is this?
Linear interpolation, matching Excel's QUARTILE.INC and most statistics software.
Why do calculators disagree?
There are nine accepted quartile definitions; results differ slightly on small samples.
What do I need to enter into the Quartile Calculator?
Just 1 value: data values. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Quartile Calculator work out the answer?
Quartiles split ordered data into four equal parts, with Q2 being the median. The working is shown step by step so you can verify the result by hand.
Is the Quartile Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.