# ››Convert ampere to milliampere

 ampere milliampere

# ››More information from the unit converter

How many ampere in 1 milliampere? The answer is 0.001.
We assume you are converting between ampere and milliampere.
You can view more details on each measurement unit:
ampere or milliampere
The SI base unit for electric current is the ampere.
1 ampere is equal to 1 ampere, or 1000 milliampere.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between amperes and milliamperes.
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# ››Definition: Amp

In physics, the ampere (symbol: A, often informally abbreviated to amp) is the SI base unit used to measure electrical currents. The present definition, adopted by the 9th CGPM in 1948 is: "one ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one metre apart in vacuum, would produce between these conductors a force equal to 2 × 10-7 newton per metre of length".

# ››Definition: Milliampere

The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.

So 1 milliampere = 10-3 ampere.

# ››Metric conversions and more

ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!