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Bar Chart in Tableau - Tableau charts

A bar chart in two minutes, plus a Gantt-chart trick to give it a bit of flair.

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  • Put a dimension on rows and a metric like quantity on columns to create a basic bar chart, and use the rotate icon to swap rows and columns
  • Set the chart type explicitly to bar before switching to a dual axis, otherwise Tableau will change the chart type automatically
  • Duplicate a measure and set the second copy to a Gantt chart, then combine them on a dual axis for a layered effect
  • Always synchronise the axis and hide the redundant right-hand header when using a dual axis

A quick way to build a standard bar chart in Tableau, then dress it up by layering a Gantt chart over it using a dual axis so the bars look more refined without losing normal bar chart functionality like sorting.

Uses a simple dataset with a category dimension and a quantity metric to build the base bar chart before applying the dual-axis flourish.

The Breakdown
  1. Build the basic bar chart 0:00

    Put a dimension on rows and a metric on columns to get a standard bar chart. Use the rotate icon at the top to flip the orientation, which just swaps what's on rows and columns.

  2. Duplicate the measure 0:31

    Copy the metric pill and hold command/control while dragging it across so you end up with two identical bar charts side by side, ready to be combined.

  3. Set the second chart to Gantt 0:41

    Change the duplicated measure's chart type to Gantt bar. This is the unconventional bit — you're deliberately breaking from a standard bar chart to create the layered look.

  4. Lock the first chart's type before going dual axis 0:51

    You must set the original chart's type explicitly to bar (not automatic) before combining into a dual axis, otherwise Tableau will change the chart type on you automatically once dual axis is applied.

  5. Combine into a dual axis 1:01

    Select the second measure and choose dual axis to lay the two charts directly on top of each other. At this point they'll look identical because the colours match.

  6. Recolour to reveal the layering effect 1:20

    Change the colour of the first (bar) chart to a paler shade so the Gantt layer shows through, giving the bar a subtler, more polished appearance.

  7. Synchronise axes and hide the duplicate header 1:29

    Always synchronise the dual axis so the two layers stay aligned as the view changes, then hide the redundant right-hand axis header via right-click for a clean finish.

Worth Knowing
  • Setting the chart type to bar explicitly before creating the dual axis is essential — skip it and Tableau silently changes the chart type once dual axis is applied.
  • Forgetting to synchronise the axes means the two layered charts can drift out of alignment even though they look fine at first glance.
Use It When

Reach for this when you want a bar chart that still sorts and behaves normally but needs a slightly more polished, less default look for a dashboard or presentation.

How this Rollup was made provenance & method

A Rollup is drafted by AI from the video's transcript, then reviewed and edited by Tim. Everything used to produce this one is listed below — the model, the exact prompt, and the source video — so the process is transparent and reproducible.

Transcription
On-device — NVIDIA Parakeet v3 for recent videos, OpenAI Whisper large-v3 for earlier ones. The transcript never leaves the machine or gets published.
Drafting
Claude Sonnet 5 in the cloud, from that transcript.
Prompt
The exact Rollup prompt (v2) — the full system prompt, unedited.
Source video
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Drafted
5 July 2026 at 09:38
Reviewed & edited
5 July 2026 at 09:41 · by Tim Ngwena

Model + prompt + video is everything you'd need to recreate a Rollup like this yourself. The one thing we don't share is the transcript.

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