# Ampere vs. Milliampere: What's the Difference?

Edited by Sumera Saeed || By Sawaira Riaz || Updated on October 7, 2023
An ampere (A) is a unit of electric current, and a milliampere (mA) is one thousandth of an ampere, representing smaller currents.

## Key Differences

Ampere and milliampere are units of electrical current in the International System of Units (SI). An ampere, symbolized as ‘A,’ is the base unit of electric current and represents the flow of one coulomb of charge per second. A milliampere, on the other hand, is a submultiple unit of electric current, denoted as ‘mA,’ and is one-thousandth of an ampere, making it suitable for measuring smaller currents, typically in more delicate circuits or components.
Sawaira Riaz
Sep 27, 2023
The conceptualization of ampere and milliampere is crucial for understanding electrical phenomena and is foundational in electrical engineering and physics. Ampere quantifies the rate of flow of electric charge in a conductor and is a determinant in understanding the strength of the electric current in a circuit. A milliampere, by being a fractional unit of an ampere, allows for precise measurements and adjustments in applications where a full ampere would be excessive, such as in medical devices or intricate electronic components.
Sawaira Riaz
Sep 27, 2023
The application of ampere and milliampere is widespread in the field of electronics and electrical studies. The use of ampere is common in contexts involving larger electric currents, such as household appliances and industrial equipment, as it provides a comprehensive measure of the flow of electricity. In contrast, milliampere is more prevalent in small-scale applications and delicate devices, due to its capability to represent minute currents, thus providing an accurate understanding of the functionality of such devices.
Sawaira Riaz
Sep 27, 2023
Understanding ampere and milliampere is crucial for anyone involved in the field of electronics, electrical engineering, or physics. While the ampere is foundational and applicable in generalized contexts due to its status as a base unit, the milliampere, with its smaller magnitude, caters to specialized needs, ensuring precision and reliability in sensitive environments and applications.
Sawaira Riaz
Sep 27, 2023
When it comes to the practical application of these units, an ampere is substantial and is employed in scenarios dealing with substantial electric currents, offering insights into the performance and safety of electrical systems. The milliampere, with its fractional value, is indispensable in scenarios requiring meticulous attention to detail and precision, such as in the calibration of medical and scientific instruments.
Sara Rehman
Sep 27, 2023

## Comparison Chart

### Unit of Measurement

Base unit of electric current in SI.
Submultiple unit, 1/1000 of an Ampere.
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Sep 27, 2023

A
MA
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Sep 27, 2023

### Magnitude

Measures larger currents.
Suitable for measuring smaller currents.
Sawaira Riaz
Sep 27, 2023

### Usage

Used in household appliances and industrial equipment.
Common in medical devices and intricate electronic components.
Sara Rehman
Sep 27, 2023

### Representation

Represents the flow of one coulomb of charge per second.
Represents one-thousandth of the flow of an ampere.
Sara Rehman
Sep 27, 2023

## Ampere and Milliampere Definitions

#### Ampere

Represents the flow of one coulomb of charge per second.
The circuit is designed to handle a current of up to 15 amperes.
Janet White
Sep 27, 2023

#### Milliampere

A unit of electric current equal to one-thousandth of an ampere.
The medical device operates at 50 milliamperes.
Sawaira Riaz
Sep 27, 2023

#### Ampere

A unit of electric current in the International System of Units.
The household appliance operates at 10 amperes.
Harlon Moss
Sep 27, 2023

#### Milliampere

Suitable for representing minute currents in scientific applications.
The scientific instrument measures current in milliamperes for accuracy.
Janet White
Sep 27, 2023

#### Ampere

Measures the amount of electric charge passing a point in an electric circuit per unit time.
The electrical device has a current rating of 5 amperes.
Sara Rehman
Sep 27, 2023

#### Milliampere

Utilized for denoting small electric currents in delicate circuits.
The sensor has a low current consumption of 5 milliamperes.
Harlon Moss
Sep 27, 2023

#### Ampere

Utilized to gauge the flow of electricity in a conductor.
Most electric kettles operate between 5 and 10 amperes.
Aimie Carlson
Sep 27, 2023

#### Milliampere

Allows precise measurement of electric current in intricate components.
The LED indicator draws a current of 20 milliamperes.
Harlon Moss
Sep 27, 2023

#### Ampere

Indicates the strength of electric current in electrical conductors.
Circuit breakers are triggered when the flow exceeds 20 amperes.
Sawaira Riaz
Sep 27, 2023

#### Milliampere

Emphasizes accuracy and precision in measuring small electric currents.
For delicate electronic devices, currents are often measured in milliamperes.
Sawaira Riaz
Sep 27, 2023

#### Ampere

The basic unit of electric current, equal to one coulomb per second and equivalent to the current, flowing in two straight parallel wires of negligible cross section separated by a distance of one meter, that produces a force between the wires of 2.0 × 10-7 newtons per meter of length. The value of an ampere in the International System differs very slightly from that in the meter-kilogram-second-ampere system of units. See Table at measurement.
Sawaira Riaz
Mar 24, 2023

#### Milliampere

A unit of current equal to one thousandth (10-3) of an ampere.
Sawaira Riaz
Mar 24, 2023

#### Ampere

A unit of electrical current, the standard base unit in the International System of Units; colloquially amp. Abbreviation: amp, Symbol: A
Definition: The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602
X 10−19 when expressed in the unit C, which is equal to A
S, where the second is defined in terms of ΔνCs. ([https://www.bipm.org/en/si-base-units/ampere The International Bureau of Weights and Measures])
Sawaira Riaz
Mar 24, 2023

#### Milliampere

One thousandth (10-3) of an ampere.
Sawaira Riaz
Mar 24, 2023

#### Ampere

The unit of electric current; - defined by the International Electrical Congress in 1893 and by U. S. Statute as, one tenth of the unit of current of the C. G. S. system of electro-magnetic units, or the practical equivalent of the unvarying current which, when passed through a standard solution of nitrate of silver in water, deposits silver at the rate of 0.001118 grams per second. Called also the international ampère.
Sawaira Riaz
Mar 24, 2023

#### Milliampere

The thousandth part of one ampère.
Sawaira Riaz
Mar 24, 2023

#### Ampere

A former unit of electric current (slightly smaller than the SI ampere)
Sawaira Riaz
Mar 24, 2023

#### Milliampere

One thousandth of an ampere
Sawaira Riaz
Mar 24, 2023

#### Ampere

The basic unit of electric current adopted under the Systeme International d'Unites;
A typical household circuit carries 15 to 50 amps
Sawaira Riaz
Mar 24, 2023

## FAQs

#### Is an ampere a base unit in SI?

Yes, an ampere is a base unit of electric current in the International System of Units (SI).
Sawaira Riaz
Sep 27, 2023

#### Is ampere used for measuring larger electric currents?

Yes, amperes are used for measuring larger electric currents.
Sawaira Riaz
Sep 27, 2023

#### Can a milliampere represent fractional values of an ampere?

Yes, a milliampere represents fractional values, specifically one-thousandth of an ampere.
Sawaira Riaz
Sep 27, 2023

#### Are amperes and milliamperes both units of electric current?

Yes, both amperes and milliamperes are units of electric current.
Janet White
Sep 27, 2023

#### How many amperes are in a milliampere?

A milliampere is one-thousandth of an ampere.
Sawaira Riaz
Sep 27, 2023

#### Does an ampere quantify the rate of flow of electric charge?

Yes, an ampere quantifies the rate of flow of one coulomb of charge per second.
Harlon Moss
Sep 27, 2023

#### Is milliampere suitable for measuring smaller currents?

Yes, a milliampere is suitable for measuring smaller electric currents.
Sara Rehman
Sep 27, 2023

#### Can amperes measure the flow of electric charge?

Yes, an ampere measures the flow of electric charge in a conductor.
Harlon Moss
Sep 27, 2023

#### Is milliampere ideal for intricate electronic components?

Yes, milliamperes are ideal for intricate electronic components due to their smaller magnitude.
Sara Rehman
Sep 27, 2023

#### Can milliampere ensure precision in delicate environments?

Yes, milliamperes ensure precision in measuring electric current in delicate environments.
Sawaira Riaz
Sep 27, 2023

#### Is ampere more common in household appliances?

Yes, amperes are commonly used to measure current in household appliances.
Sawaira Riaz
Sep 27, 2023

#### Is milliampere more prevalent in medical devices?

Yes, milliamperes are often used in medical devices due to their precision.
Sawaira Riaz
Sep 27, 2023

#### Can milliampere measure minute currents in scientific instruments?

Yes, milliamperes are suitable for measuring minute currents in scientific instruments.
Sara Rehman
Sep 27, 2023

#### Can ampere be used to represent the strength of electric current in conductors?

Yes, amperes are used to indicate the strength of electric current in electrical conductors.
Sara Rehman
Sep 27, 2023

#### Are milliamperes a submultiple unit of amperes?

Yes, milliamperes are a submultiple unit of amperes, representing one-thousandth of an ampere.
Sawaira Riaz
Sep 27, 2023