Sankey Diagram Generator

Input guidance

Enter each flow as source, target, and numeric value.

How to use this tool

1. Enter each flow as source, target, and numeric value.
2. Use consistent units across all rows.
3. Generate the diagram and review whether totals and labels make sense.
4. Download the visual or copy a share link after checking grouping, labels, and flow totals.

Formula or method

• Each row becomes a directed flow from source to target with width proportional to value.
• The diagram communicates magnitude and direction but does not verify whether the underlying accounting is complete.

Worked example

Showing budget movement

• Budget, Product, 50000
• Budget, Marketing, 30000
• Marketing, Paid Search, 12000

Result: The Sankey chart shows how the original budget splits into departments and subchannels.

Check that inflows and outflows reconcile where conservation or accounting balance matters.

How to interpret the result

Read a Sankey diagram as a flow explanation; trust depends on clean labels, consistent units, and reconciled totals.

• Wide links draw attention, so avoid mixing incompatible units.
• Group small categories deliberately to reduce visual clutter.
• Check whether flows should balance at intermediate nodes.

Common mistakes

• Mixing percentages and raw values in the same diagram.
• Using duplicate labels with slightly different spelling.
• Presenting estimated flows without labeling them as estimates.

Assumptions

• All values are nonnegative and comparable.
• Source and target labels identify the intended flow stages.

FAQ