**Five hundred milliamperes (mA) is equivalent to half an ampere (A), often known as an amp. Ampere is the unit for measuring and expressing electric current in the metric system. **One milliampere is equivalent to one thousandth of an amp, which may be written as 1 mA = 0.001 A. In order to convert 500 mA to amps, multiply 500 by 0.001, which results in 0.5. The answer to the question “What is 500 milliamperes in amps?” is a simple issue of multiplication.

Calculating the 500mA to A conversion — or any other mA to A conversions — might be useful when completing mathematical conversions for a homework assignment or when working on a home project and finally needing to calculate another electricity-related value. For instance, watts equal amps multiplied by volts. If you have a milliamp measurement and a volt measurement and you need to calculate watts, you must first convert the milliamps to amps before completing the calculation.