Analyze values with flexible quartile rules quickly. See box plot essentials from one simple page. Export clean summaries for study notes, audits, and reviews.
| Sample Dataset | Minimum | Q1 | Median | Q3 | Maximum |
|---|---|---|---|---|---|
| 5, 7, 9, 10, 12, 14, 16, 20, 25 | 5 | 8 | 12 | 18 | 25 |
The example above uses the Tukey exclusive median halves method.
Five number summary: Minimum, Q1, Median, Q3, Maximum
Range: Maximum − Minimum
Interquartile range: IQR = Q3 − Q1
Lower fence: Q1 − 1.5 × IQR
Upper fence: Q3 + 1.5 × IQR
Outlier rule: Values below the lower fence or above the upper fence are treated as outliers.
Whiskers: The box plot whiskers extend to the smallest and largest non outlier values.
A box plot five number summary gives a fast view of distribution. It shows the minimum, first quartile, median, third quartile, and maximum. These values describe center, spread, and balance. They also help reveal skewness and unusual observations. Students, analysts, and researchers use this summary because it is compact. It turns a long dataset into a short statistical picture.
This calculator sorts raw values and finds the key summary points. It reports quartiles, range, interquartile range, whiskers, and fences. It also flags outliers when values fall outside the usual box plot limits. That makes it useful for classroom tasks, lab reports, surveys, quality checks, and business reviews. You can also compare quartile methods when a course or textbook uses a different rule.
The median marks the middle of the dataset. The quartiles split the ordered values into sections. The interquartile range measures the middle spread. Small ranges suggest tighter clustering. Large ranges suggest more variation. Fences help identify values that deserve a second look. A quick box plot view can show whether data is symmetric, stretched, or affected by extreme points.
Use this calculator when you need reliable descriptive statistics without extra steps. It helps with exam practice, homework checking, report writing, and dataset screening. It is also helpful before deeper analysis. A clean five number summary can guide later work with variance, normality, or regression. When the summary looks unusual, you know where to inspect the data more carefully.
Quartile rules are not always identical. Some methods exclude the median from each half. Others include it. Some interpolate between positions. For small datasets, the chosen rule can change Q1 and Q3. That also changes the interquartile range and the outlier fences. This calculator lets you test those methods quickly. You can match your class requirement, textbook convention, or internal reporting standard without doing repeated manual work.
Because results appear instantly, you can test cleaned data, adjusted samples, and suspected outliers in one place. That saves time and reduces avoidable calculation mistakes.
It is a compact description of ordered data. It includes the minimum, Q1, median, Q3, and maximum. These values support quick distribution checks.
A box plot shows the middle spread, central value, whiskers, and possible outliers. It turns the five number summary into an easy visual display.
Different books and software use different quartile rules. Small datasets are most affected. That is why this calculator lets you choose the method.
The interquartile range, or IQR, equals Q3 minus Q1. It measures the spread of the middle half of the dataset and supports outlier detection.
This calculator uses the common 1.5 × IQR rule. Values below the lower fence or above the upper fence are listed as outliers.
Yes. You can paste values separated by commas, spaces, semicolons, tabs, or line breaks. Choose the matching delimiter option before calculating.
Yes. Raw input is cleaned, validated, converted to numbers, and sorted automatically. That reduces manual work and helps avoid ranking mistakes.
Use it when your course, report template, or software expects percentile style quartiles. It is common in spreadsheet and statistical software workflows.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.