The power is measure of how quickly energy is used and is measured in watts. The power can be determined by measuring the voltage and current on a device using a digital multimeter. Connect the measurement leads to the multimeter. ... This time the display should show the measured value of current in amps.

How do you determine wattage?

The formula for calculating wattage is: W (joules per second) = V (joules per coulomb) x A (coulombs per second) where W is watts, V is volts, and A is amperes of current. In practical terms, wattage is the power produced or used per second. For example, a 60-watt light bulb uses 60 joules per second.

What does a multimeter measure in?

A digital multimeter is a test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance (ohms). It is a standard diagnostic tool for technicians in the electrical/electronic industries.