Sankey Diagram

Use Mermaid sankey-beta to show quantities flowing from one category to another.

Basic template

sankey-beta
    A, B, 10
    A, C, 5

Core syntax

• Start with sankey-beta
• Add flows as Source, Target, Value
• Repeat sources and targets across multiple rows to build the network

Common example

sankey-beta
    Leads, Qualified, 120
    Leads, Lost Early, 80
    Qualified, Proposal, 70
    Qualified, Closed Lost, 50
    Proposal, Won, 25
    Proposal, Lost Late, 45

Good for

• Funnels
• Cost allocation
• Data movement summaries

Watch for

• Sankey diagrams communicate relative magnitude best when values differ meaningfully
• If you only need sequence without quantities, use a flowchart instead