What does a multimeter measure?

A multimeter is a versatile tool primarily used in electrical and electronic work to measure three key electrical parameters: voltage, current, and resistance.

Voltage, measured in volts, indicates the potential difference between two points in an electrical circuit. Current, measured in amperes, quantifies the flow of electric charge through a conductor. Resistance, measured in ohms, assesses how much a material opposes the flow of electric current.

This combination of measurements makes the multimeter essential for diagnosing electrical problems in circuits, as well as for ensuring that components and systems are functioning correctly. While other types of gauges or instruments can measure temperature, pressure, or physical properties such as force and speed, these are not functions of a multimeter. Thus, the focus on electrical measurements distinguishes the multimeter from other measuring devices.