A Sankey diagram shows how a quantity moves between stages. Each ribbon connects a source to a target, and its width is proportional to the value. Major routes, splits, and losses are visible at a glance.
Researchers use Sankey charts for energy balances, material flows, patient pathways, budgets, and any system where a measurable quantity passes through connected steps. The chart works best when every row has a clear source, target, and number.
This Sankey diagram generator draws your rows instantly and flags any intermediate node whose incoming and outgoing totals differ. A mismatch can be meaningful, so the tool reports it and never changes your data on its own.
Source
Where a flow starts, such as coal, rainfall, or a study cohort.
Target
The next stage or destination that receives the quantity.
Value
A positive number that sets the ribbon width.
Balance
Compare total input and output at each intermediate node.
