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Single conversion
To convert from Ampere (A) to Milliampere (mA), use the following formula:
Let's convert 5 Ampere (A) to Milliampere (mA).
Using the formula:
Therefore, 5 Ampere (A) is equal to Milliampere (mA).
Here are some quick reference conversions from Ampere (A) to Milliampere (mA):
| Amperes | Milliamperes |
|---|---|
| 0.000001 A | mA |
| 0.001 A | mA |
| 0.1 A | mA |
| 1 A | mA |
| 2 A | mA |
| 3 A | mA |
| 4 A | mA |
| 5 A | mA |
| 6 A | mA |
| 7 A | mA |
| 8 A | mA |
| 9 A | mA |
| 10 A | mA |
| 20 A | mA |
| 30 A | mA |
| 40 A | mA |
| 50 A | mA |
| 100 A | mA |
| 1000 A | mA |
| 10000 A | mA |
For all Current converters, choose units using the From/To dropdowns above.
An Ampere, often shortened to "amp" or A, is the standard base unit used to measure electric current.
It's part of the International System of Units (SI), which is the modern form of the metric system.
In practical terms, the Ampere measures the rate of flow of electric charge, or the amount of electrical current.
A common analogy is to compare electricity to water flowing through a pipe. In this scenario, voltage is the water pressure, while the Ampere (or "amp") represents the volume of water flowing past a certain point per second.
A higher amperage means more electrons are flowing.
This is why high-power devices like space heaters, hair dryers, or power tools require a much higher amp rating (e.g., 10-15 amps). In contrast, small devices like LED lights or phone chargers use much less (often 1-2 amps).
While the practical definition is most straightforward, the official scientific definition was updated in 2019.
Today, the Ampere is defined based on the elementary charge (e), which is the electric charge of a single proton. This value is fixed at exactly 1.602176634 × 10-19 Coulombs.
This modern definition ties the Ampere directly to a fundamental constant of nature, ensuring its stability and precision.
An Ampere represents the flow of one Coulomb of charge (approximately 6.242 x 1018 elementary charges) passing a point in one second.
The Ampere is named in honor of André-Marie Ampère (1775-1836), a renowned French physicist and mathematician.
He is widely considered one of the principal founders of the science of electromagnetism, which he termed "electrodynamics."
His most famous contribution is Ampère's circuital law, which mathematically describes the magnetic force between two electrical currents. Naming the unit of current after him recognizes his foundational work in understanding the relationship between electricity and magnetism.
A milliampere (mA) is a crucial unit used to measure small amounts of electrical current.
Think of electrical current like the flow of water through a pipe. If a large pipe represents an ampere (A)—the standard unit for current—then a milliampere would be the tiny trickle of water flowing through a drinking straw.
It is part of the International System of Units (SI) and is equal to one-thousandth of an ampere.
1 A = 1,000 mA.
The milliampere is a standard submultiple of the ampere, the base unit for electrical current.
The prefix "milli" signifies one-thousandth (10-3).
This standardized measurement ensures that engineers, scientists, and technicians worldwide are using consistent values for measuring electricity.
Because a milliampere represents a very small amount of current, it is the perfect unit for measuring the power consumption of everyday small electronics.
You'll see mA used to describe the electricity needed for: