# How Many Amps Does 500 mA Equal?

By Staff WriterLast Updated Apr 17, 2021 12:13:56 AM ET Photo Courtesy: serts/E+/Getty Images

Five-hundred milliamperes (mA) is equal to 0.5 amperes (A), which are also commonly called amps. In the metric system, an ampere is the unit for measuring and representing electric current. One mA is equal to one thousandth of an amp, which can be represented in numbers as 1 mA = 0.001 A. Thus, to convert 500 mA to amps, you can multiply 500 by 0.001, which gives you 0.5. Answering the question of "What is 500 mA in amps?" is a matter of simple multiplication.

It can be helpful to figure out the 500mA to amp equivalent — or any mA to A equivalencies — when you're doing mathematical conversions for a homework assignment or if you're working on a home project and ultimately need to figure out another electricity-related value. For example, watts are equal to amps times volts. If you have a milliamp measurement and a volt measurement and need to figure out watts, you'll first need to convert the milliamps to amps in order to process the final equation.