Convert Amperes to Milliamperes

Enter the electric current in amperes below to get the value converted to milliamperes.

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1 A = 1,000 mA

How to Convert Amperes to Milliamperes

conversion scale showing amperes and equivalent milliamperes electric current values

To convert an ampere measurement to a milliampere measurement, multiply the electric current by the conversion ratio. One ampere is equal to 1,000 milliamperes, so use this simple formula to convert:

milliamperes = amperes × 1,000

The electric current in milliamperes is equal to the amperes multiplied by 1,000.

For example, here's how to convert 5 amperes to milliamperes using the formula above.
5 A = (5 × 1,000) = 5,000 mA

Amperes and milliamperes are both units used to measure electric current. Keep reading to learn more about each unit of measure.

Amperes

The ampere, commonly referred to as an "amp," is the electrical current constant equal to the flow of one coulomb per second.

The ampere was previously defined as a constant current that when passed through two straight and parallel conductors that are spaced one meter apart, will produce a force equal to 0.0000002 newtons per meter of length.

In 2019, the ampere was redefined as the electric current corresponding to the flow of 1/(1.602 176 634 × 10-19) elementary charges per second.[1]

The ampere is the SI base unit for electric current in the metric system. A ampere is sometimes also referred to as an amp. Amperes can be abbreviated as A, for example 1 ampere can be written as 1 A.

Ohm's Law states the current between two points on a conductor is proportional to the voltage and inversely proportional to the resistance. Using Ohm's Law, it's possible to express the current in amperes as an expression using resistance and voltage.

IA = VVR

The current in amperes is equal to the potential difference in volts divided by the resistance in ohms.

Milliamperes

One milliampere is equal to 1/1,000 of an ampere, which is the electrical current equal to the flow of one coulomb per second.

The milliampere is a multiple of the ampere, which is the SI base unit for electric current. In the metric system, "milli" is the prefix for 10-3. A milliampere is sometimes also referred to as a milliamp. Milliamperes can be abbreviated as mA, for example 1 milliampere can be written as 1 mA.

Ampere to Milliampere Conversion Table

Ampere measurements converted to milliamperes
Amperes Milliamperes
0.001 A 1 mA
0.002 A 2 mA
0.003 A 3 mA
0.004 A 4 mA
0.005 A 5 mA
0.006 A 6 mA
0.007 A 7 mA
0.008 A 8 mA
0.009 A 9 mA
0.01 A 10 mA
0.02 A 20 mA
0.03 A 30 mA
0.04 A 40 mA
0.05 A 50 mA
0.06 A 60 mA
0.07 A 70 mA
0.08 A 80 mA
0.09 A 90 mA
0.1 A 100 mA
0.2 A 200 mA
0.3 A 300 mA
0.4 A 400 mA
0.5 A 500 mA
0.6 A 600 mA
0.7 A 700 mA
0.8 A 800 mA
0.9 A 900 mA
1 A 1,000 mA

References

  1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9.pdf