What unit is typically used for small electric currents?

The appropriate unit for measuring small electric currents is the milliamp, which is equal to one-thousandth of an ampere. While microamperes (the unit indicated in the chosen answer) are indeed used for even smaller currents—one millionth of an ampere—the milliamp range is more common for small currents encountered in practical applications such as electronic circuits, sensors, and other low-power devices. Microamperes are used for very sensitive measurements, but for typical small currents in most electrical systems and components, milliamps are the standard measurement unit.

Kiloamperes and megaamperes represent much larger currents and would not be applicable for small electric currents.