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Sankey diagram generator.

Create a Sankey diagram to show how a measured quantity moves and splits across stages. Use it for energy, spending, customers, water or any flow where proportional width matters.

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See it work

Sankey diagram examples.

Same tool, four requests. Every drawing below is a real render.

What you type
Create a Sankey diagram of Riverbend Plant monthly energy flow in MWh, from grid power and natural gas through boilers and electricity to production, HVAC, heat and losses.
Then tryAdd solar generation feeding electricity.Change losses to show 300 MWh.
Sankey diagram: Plant energy flow
Sankey diagram · echarts-sankey

Rather start from a finished drawing? Browse 5 sankey diagram templates →

The drawing

What a Sankey diagram is.

A Sankey diagram shows a quantity moving from one stage to another, with each link drawn in proportion to its value. It makes large transfers, splits and losses visible faster than a table of flows.

Start with a clearly defined total and include the unit and time period. Flows should balance at each stage where the source data permits it, including losses, waste and exits.

Engine
echarts-sankey
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Describe the change
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Sankey diagram: What a Sankey diagram is
Who uses it

Who uses Sankey diagrams.

Sankey diagram: Operations teamsOperations teams

Find the largest energy inputs, uses and losses in an audit.

Sankey diagram: Finance leadersFinance leaders

Show how a budget is allocated from a total to accountable teams.

Sankey diagram: Growth teamsGrowth teams

See where a customer cohort advances or exits through a journey.

How it works

How to make a Sankey diagram in three steps.

01

Describe it

One paragraph is enough to start.

“Create a Sankey diagram of Riverbend Plant monthly energy flow in MWh, from grid power and natural gas through boilers and electricity to production, HVAC, heat and losses.”
02

See the drawing

Drawn by the right engine.

Sankey diagram: Plant energy flow
03

Say what changes

Every edit keeps a version.

Add solar generation feeding electricity.
V2 · DRAWN FROM V1, NOTHING RETYPED
FAQ

Common questions

What is a Sankey diagram?

A Sankey diagram is a flow chart whose link widths are proportional to the quantity moving between nodes.

What data do I need for a Sankey diagram?

List every source, target and flow value, plus the unit and reporting period. Include losses or exits when they are part of the balance.

How is a Sankey diagram different from a flowchart?

A flowchart shows sequence and relationships, usually with equal-width connectors. A Sankey chart additionally makes connector width represent quantity.

Can a Sankey diagram show percentages?

Yes, if the percentages use the same denominator and the stages are clearly labelled. Values are often easier to audit when shown alongside the total.

Related tools

Other drawings for the same work.

Make a Sankey diagram now.

Free account, no card. Describe the sources, destinations and values.

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