How many ampere in 1 milliampere?
The answer is 0.001.
We assume you are converting between ampere and milliampere.
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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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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".
The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.
So 1 milliampere = 10-3 ampere.
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