What are the numbers on a meter called?

The numbers on a meter are referred to as the scale because they represent the range of measurements that the meter is capable of displaying. The scale is typically marked along a linear path or in increments on the meter face and helps users interpret the measurement being taken based on the position of the indicator needle or digital readout. This value is what the operator uses to evaluate the status or performance being monitored, whether it’s voltage, current, frequency, or any other parameter.

While terms like readout might describe the display presentation of the measurement and index might refer to a reference point or marker on the scale, neither accurately describes the systematic distribution of numbers that provide the basis for measurement interpretation. The term "value" generally refers to the specific measurement indicated on the scale but does not encompass the overall structure of the numbered markers that comprise the scale itself.