Energy Flow Diagram Maker
Energy flows are where the sankey diagram was born, and they are still its best use: sources on the left, conversions in the middle, useful output and losses on the right. MakeCharts lets you build one from measurement data and adjust it by chatting instead of redrawing.
Start free in seconds
Open the editor, drop in your data and export your first chart in minutes. Start on the free plan and upgrade when you want watermark-free exports.
Open the editorHow it works, step by step
Enter sources and destinations
Add each energy source (grid, solar, gas) and each destination (heating, machinery, losses) with its amount in kWh, MJ or any unit you use.
Refine the layout with AI
Ask for losses in red, renewables in green, or an extra conversion stage in the middle. The diagram rebalances itself after every change.
Export for the audit or paper
Download a vector SVG for reports and publications, where energy diagrams are usually printed, or a PNG for slides and intranets.
Frequently asked questions
What is an energy flow diagram?
It is a sankey diagram applied to energy: it traces energy from sources through conversions to end uses, with ribbon widths proportional to the amount of energy flowing.
Can I show losses at each stage?
Yes. Add a loss flow leaving each conversion node and color the losses red or gray. The proportions make inefficiencies visible at a glance.
Which units can I use?
Any unit, as long as you are consistent: kWh, MWh, MJ, BTU or even percentages. The diagram only cares about relative amounts.
Can I import measurements from a spreadsheet?
Yes. Lay out your measurements as source, target and amount columns, export as CSV and import the file into the editor.
Your data is ready. Your chart is three steps away.
Open the editor