Create a Pie Chart online with InstaNANO
The InstaNANO Graph Plotter can create a pie chart directly in your browser. The interactive graph above is already initialized with example data. Replace those values with your own table, assign the supported column roles, adjust the graph settings, and inspect the result on the same page.
A pie chart shows the relative parts of one positive-valued composition as slices of a circle. Use it only for a small set of categories that form a meaningful whole.
Required data columns and series controls
| Column role | Supported layout | How InstaNANO uses it |
|---|---|---|
| X-axis | One category label column | Provides the slice name; text labels are accepted. |
| Y-axis | One positive numeric value column | Provides the size of each slice. |
The graph forms slices from the category labels and positive Y values. Do not use the single Y-axis Color row as an additional quantitative variable; slice colors are assigned at the datum level by the pie renderer.
How to make this graph
- Start with the working example. Review the graph and table loaded above so the relationship between the columns and plotted marks is visible before you replace the values.
- Enter or paste your data. Keep the columns in the supported order shown in the table below the graph. Use the Axis row to assign each column’s role.
- Name and distinguish the series. Where the current graph supports them, use the Name row for the displayed series label and the Color row for its color.
- Check the scientific context. Add meaningful axis titles and units, review scale choices, and confirm that row order, missing values, uncertainty columns, or normalization match the intended interpretation.
- Refine and export. Use the available graph controls described below. When the figure is ready, sign in to export a PNG with Download Graph or preserve an editable
.instananofile with Save Project.
What the loaded example demonstrates
The starter table lists named fractions such as anatase and rutile with positive values. It demonstrates how labels and values become slices; it is not a quantitative phase-analysis result.
What InstaNANO calculates and renders
The renderer reads the first category and Y-value pair, excludes non-positive values, and calculates each slice percentage from the sum of the remaining values. A tooltip reports the category, value, and calculated share.
The current pie renderer uses the first X–Y pair and provides a slice-gap control; values must be positive to contribute.
Scientific instruments and research data suited to this graph
Use it for a compact composition summary, such as phase-related fractions or component allocation, when readers do not need precise comparisons across many categories.
Broad instrument and data coverage
- Phase and material composition: Externally quantified crystalline phases, mineral fractions, alloy constituents, ceramic components, polymer blends, or composite contents forming one defined whole.
- Elemental and chemical fractions: EDS, XPS, XRF, ICP, chromatography, spectroscopy, or chemical-analysis results after valid quantification and normalization outside the graph.
- Spectral and fitted components: Peak-area, band, relaxation, or signal-component shares when the components are mutually interpretable and their total is scientifically defined.
- Formulation and process allocation: Ingredient fractions, product distributions, mass balance, energy allocation, resource use, or category shares for one sample or system.
- Classification and population summaries: A small number of mutually exclusive morphology classes, defect types, biological categories, or outcome groups reported as positive values.
Representative questions for this exact graph
- A small number of positive component or phase-related values forming one defined whole.
- Resource or allocation fractions for one sample.
- A single composition summary where approximate share is more important than precise cross-category comparison.
This coverage is not limited to the instruments named above. InstaNANO can plot other experimental, microscopy-derived, computational, simulation, and processed research data when the required column roles are present and this graph’s encoding is scientifically appropriate.
Data checks before interpretation
- Use clear category labels and positive finite values for the intended parts.
- Verify the definition of the whole and compositional basis outside the graph.
Frequently asked questions about Pie Chart
Does the pie chart verify compositional closure or mutually exclusive categories?
Slice angles are difficult to compare when there are many categories or similar values. The chart does not verify that values are fractions, that they sum to a physical total, or that the categories are mutually exclusive.
Can I plot data from instruments or research workflows not listed here?
Yes. The instrument and dataset examples on this page are representative rather than a fixed compatibility list. InstaNANO can create a pie chart from other experimental, computational, simulation, and processed research data when the table follows these roles: X-axis (one category label column), Y-axis (one positive numeric value column). Microscopy use refers to numeric profiles, coordinates, dimensions, counts, intensities, distributions, or map values extracted from images; the graph does not convert a raw micrograph into numerical data.
Can I use this pie chart in a publication, thesis, report, poster, or presentation?
Yes, after scientific and visual review. InstaNANO can be used to prepare a pie chart for a journal manuscript, thesis or dissertation, technical report, poster, conference slide, classroom presentation, or other formal scientific communication. After sign-in, Download Graph exports a PNG, defaults to 600 dpi, and offers a transparent-background option. For this graph, define the whole, compositional basis, included categories, and any normalization or excluded fraction. Also check final dimensions, font size, line and symbol weight, color accessibility, caption content, and the destination’s required file format. The current export is PNG, so a journal that requires TIFF, EPS, PDF, SVG, or another format needs a journal-specific workflow. InstaNANO supports figure preparation, but it cannot guarantee that a journal, conference, institution, or publisher will accept a figure.
Choose a related graph when needed
Choose Donut Chart when a central visual space is useful, 100% Stacked Bar Chart for comparing compositions across multiple samples, or Bar Chart for more precise category comparison.
Plot your data or compare graph types
Edit the loaded Pie Chart example above to test your own values. If this encoding does not match the scientific question, compare the complete graph-type directory or return to the online graph plotter.