Free Stem and Leaf Plot Generator – Create Diagrams Online

Display data in semi-tabular form that preserves original values while showing distribution.

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Try: "Analyze my current data" or "Generate temperature data for 12 cities, 15 points each"

How to Use This Free Stem and Leaf Plot Generator – Create Diagrams Online

  1. Enter your data. Paste comma-separated numbers into the text area above. You can also click Samples to try a pre-loaded dataset like test scores or heights.
  2. Click Generate. The stem and leaf plot maker splits each number into a stem (tens digit) and leaf (ones digit), then sorts and displays them in an organized table.
  3. Read the key. The key at the bottom — e.g. "2 | 3 = 23" — tells you how to interpret the values. Stems are on the left, leaves on the right.
  4. Analyze the distribution. Look at the leaf arrangement to see the shape of your data — check for symmetry, gaps, clusters, and potential outliers.
  5. Export your results. Download your stem-and-leaf plot as PNG, SVG, CSV, XLSX, or HTML for reports, assignments, or presentations.

What is a Stem-and-Leaf Plot?

A stem-and-leaf plot displays quantitative data in a semi-tabular format where each value is split into a stem (leading digits) and a leaf (final digit). For example, 73 → stem=7, leaf=3. It preserves every original value while showing distribution shape — something histograms and box plots cannot do.

Invented by statistician John Tukey in the 1970s, the stem-and-leaf plot remains a staple of introductory statistics courses. Unlike other chart types that aggregate data into bins or summaries, a stem and leaf plot keeps every data point visible, making it ideal for teaching statistical concepts and analyzing small datasets.

This free stem and leaf plot maker generates clean stem-and-leaf diagrams instantly. Simply paste your numbers, and the tool splits each value into stems and leaves, sorts them automatically, and displays a publication-ready table. Whether you are a student learning exploratory data analysis or a teacher preparing classroom materials, this online stem and leaf plot maker helps you create accurate diagrams in seconds.

Why Use a Stem and Leaf Plot?

  • Preserve every data point. Unlike histograms that group values into bins, a stem-and-leaf plot shows each individual number, so no information is lost.
  • See distribution shape instantly. The arrangement of leaves naturally reveals the shape of the data — symmetry, skewness, gaps, and clusters are visible at a glance.
  • Perfect for small datasets. When you have 10 to 50 values, a stem and leaf plot maker provides a clear, compact view without the bin-width decisions required by histograms.
  • Easy to create by hand or online. The format is simple: split each number into stem and leaf, then sort. This free online tool does the computation automatically.
  • Ideal for education. Stem-and-leaf plots are widely used in middle school, high school, and college statistics courses to teach data organization, median finding, and distribution analysis.
  • No data aggregation needed. Every original value is preserved, making stem-and-leaf plots excellent for quality control checks and precise data auditing.

Frequently Asked Questions

What is a stem and leaf plot?
A stem-and-leaf plot is a semi-tabular format where each number is split into a 'stem' (tens digit) and a 'leaf' (ones digit). It preserves every original value while showing the distribution shape — unlike histograms which group data into bins.
How do I use this stem and leaf plot maker?
Paste your comma-separated numbers into the input area above and click Generate. The free stem and leaf plot maker instantly splits each value into stem and leaf, sorts them, and displays a clean table you can read and export.
When should I use a stem and leaf plot?
Ideal for small datasets (up to 50 values) when you want to see both the distribution shape and every individual data point. Commonly used in statistics education, quality control, and exploratory data analysis.
What is the difference between a stem and leaf plot and a histogram?
A histogram groups data into bins and shows bar heights (frequencies), losing individual values. A stem-and-leaf plot preserves every data point, so you can recover the exact original numbers from the display.
Can I create a stem and leaf plot for large datasets?
Stem-and-leaf plots work best with 10–50 data points. For larger datasets, consider a histogram or box plot — both are available in our free statistics tool suite.
How do I read the key in a stem and leaf plot?
The key shows how to interpret stems and leaves. For example, '2 | 3 = 23' means a stem of 2 and a leaf of 3 represents the value 23. This stem and leaf plot maker always displays the key at the bottom.

Key Terms

Stem
The leading digit(s) of a number. For 73, the stem is 7. For 125, the stem is 12.
Leaf
The final digit of a number. For 73, the leaf is 3. For 125, the leaf is 5.
Key
Explains how to read the plot, e.g. '2 | 3 = 23' means stem=2, leaf=3 → value 23.
Distribution
The overall pattern of data — revealed by the arrangement of leaves across stems.

Computation Method

  • Stem calculation: Each number is divided by 10, and the integer part becomes the stem (e.g. 73 → stem = 7). For multi-digit numbers, the stem is all digits except the last (e.g. 125 → stem = 12).
  • Leaf extraction: The remainder modulo 10 becomes the leaf (e.g. 73 → leaf = 3, 125 → leaf = 5). Leaves are always single digits from 0 to 9.
  • Sorting: Data is sorted in ascending order, then grouped by stem. Within each stem, leaves are sorted from smallest to largest.
  • Key interpretation: The key (e.g. "2 | 3 = 23") defines how to reconstruct original values from stems and leaves.

References

  • Tukey, J. W. (1977). Exploratory Data Analysis. Addison-Wesley.
  • Emerson, J. D. & Hoaglin, D. C. (1983). "Stem-and-Leaf Displays." In Understanding Robust and Exploratory Data Analysis, ed. D. C. Hoaglin, F. Mosteller & J. W. Tukey, 7–32. Wiley.