A gauge chart (or speedometer chart) combines a Doughnut chart and a Pie chart in a single chart. If you are in a hurry, simply download the Excel file. Gauge charts, also known as dial charts or speedometer charts, display data as a readout on a dial using needles. The value of each needle on a gauge chart is read against the colored data range or chart axis. This chart type is frequently used to display critical business indicators in executive dashboard reports.