How to publish a Google Sheets Chart in a Confluence page

Very easy, see this steps

• In the Google Sheets charts, click on “Publish Chart” –> “Publish”
• Copy the URL
• Then, in your Confluence page, insert a “New Macro” –> “HTML”
• Insert an with “src” attribute and fill it with the URL

See this example:

<iframe width="500" height="265" seamless frameborder="0" scrolling="no"
  src="https://docs.google.com/a/yoursite.com/spreadsheets/d/xxx54eXXXXX&format=interactive"></iframe>