Enter Dataset
Example Data Table
This sample shows how values become stems and leaves with zero decimal places.
| Original Value | Scaled Value | Stem | Leaf | Displayed Row |
|---|---|---|---|---|
| 12 | 12 | 1 | 2 | 1 | 2 |
| 18 | 18 | 1 | 8 | 1 | 8 |
| 23 | 23 | 2 | 3 | 2 | 3 |
| 34 | 34 | 3 | 4 | 3 | 4 |
| 48 | 48 | 4 | 8 | 4 | 8 |
Formula Used
Stem-and-leaf plots organize values into a stem part and a leaf part.
1. First, choose a decimal precision level.
2. Convert each value with this scaling formula:
scaled value = round(original value × 10^precision)
3. Split the scaled value into stem and leaf:
stem = floor(scaled value / 10)
leaf = scaled value − (stem × 10)
The leaf always stays between 0 and 9. Split stems place leaves 0-4 and 5-9 on separate rows for cleaner reading.
How to Use This Calculator
Enter at least two numbers in the dataset box.
Separate values with commas, spaces, or new lines.
Choose how many decimal places should remain in the leaves.
Select ascending or descending display order.
Enable split stems when large groups need clearer rows.
Press the generate button to build the plot.
Review the summary cards, stem table, transformed table, and graph.
Use the CSV or PDF buttons to export the output.
Frequently Asked Questions
1. What does a stem-and-leaf plot show?
It shows the distribution of values while keeping the original digits visible. Stems group numbers, and leaves show the final digit after scaling.
2. When should I split stems?
Use split stems when many leaves crowd the same stem. It separates leaves 0-4 and 5-9 into different rows and improves readability.
3. Can this tool handle decimals?
Yes. Choose the number of decimal places to keep. The tool scales the values first, then builds stems and leaves from the scaled results.
4. Why does the graph use stem frequencies?
The graph summarizes how many observations fall into each stem row. It helps you spot clusters, gaps, and spread faster than scanning rows alone.
5. Does the calculator sort my data automatically?
Yes. The plot rows and leaves are ordered automatically. You can choose ascending order or descending order from the form.
6. What file types can I export?
You can export the generated result as CSV or PDF. The export includes the summary and the final stem-and-leaf rows.
7. Are negative values supported?
Yes. Negative values are converted with the same scaling formula. Their stems appear as negative rows where appropriate.
8. Is this useful for teaching statistics?
Yes. It is useful for class demonstrations, homework checks, revision sessions, and simple descriptive statistics activities.