A gauge chart shows a single value on a circular or semicircular scale, often with a needle like a speedometer. It is commonly used to show where a current value sits relative to a target, threshold, or acceptable range.

Use Cases

• Dashboard KPIs
• Operational monitoring
• Performance against target
• Status displays

Design Notes

• Use gauges for quick status, not detailed analysis.
• Show thresholds clearly.
• Avoid wasting too much dashboard space.
• Consider bullet charts or bar charts when comparison matters.

Summary

Gauge charts are familiar and easy to scan, but they are space-inefficient and limited to simple status messages. Use them when the metaphor of a meter helps the audience.