Current Converter

If you install or fix HVAC systems, you will need to take electrical current measurements at some point. A current Converter is a tool that converts the current unit value, i.e., ampere, to other current metric forms. The ampere, sometimes known as simply amp, is the International System of Units' basic unit of electric current (SI). The ampere is technically defined as the constant current at which a force of 2*10^7 newtons per meter length is created between two conductors that are parallel, infinite in length, positioned in a vacuum, and have negligible circular cross-sections. One ampere is one coulomb of charge traveling through a specific place in one second in terms of the coulomb.

A milliampere is a submultiple of the ampere, the SI unit of the electrical current. One-thousandth of an ampere is the unit of measurement.


The milliampere derives from the ampere. Metric prefixes might precede the ampere to report units of the required magnitude.

The milliampere is used globally as a submultiple of a SI unit for tiny electrical current measurements. Many instruments, such as galvanometers and ammeters, measure units in milliamperes. Athough, these devices do not measure milliamperes solely.

The ampere to milliampere formula is as follows: 

Milliampere (ma)= Ampere (a) x 1000.

To convert ampere to milliampere (a to ma), increase the ampere number by 1000.

Converting Amperes to Milliamperes

1 A = 1000 mA

1 mA = 0.001 A

Convert 15 A to mA 

as an example:

20 A = 20 × 1000 mA = 20000 mA

How to use the current converter tool?

  • Enter the current value in the relevant field. 
  • If you don't immediately discover the desired unit, click on any unit icon to see a list of different units to pick from. 
  • Then click on calculate, and this current Converter will automatically complete the necessary conversions into the remaining units.