Ampere to Milliampere Conversion

Convert between Ampere and Milliampere quickly and accurately.

From Ampere

To Milliampere

How to Convert Ampere to Milliampere

Conversion Formula

1 A = 1000 mA

1 mA = 0.001 A

Example

Convert 15 A to mA:

15 A = 15 × 1000 mA = 15000 mA

Unit Information

Learn about the current units you're converting between

Ampere

Definition

The Ampere (A) is the SI base unit of electric current, defined as one coulomb of electric charge passing through a conductor per second. It is fundamental in electrical engineering and physics for measuring the rate of electric charge flow in circuits, essential for analyzing electrical systems and designing electronic devices.

History/Origin

Named after André-Marie Ampère, a French physicist and mathematician who made significant contributions to electromagnetism in the early 19th century. The ampere was officially adopted as the SI base unit for electric current in 1948, replacing earlier definitions based on electrochemical processes and providing a more precise and reproducible standard.

Current Use

The ampere is universally used in electrical engineering, electronics, and physics to measure current flow in circuits, power systems, and electronic devices. It is essential for circuit analysis, electrical safety calculations, power system design, and the specification of electrical components and equipment in industrial, commercial, and residential applications.

Multiplier

Offset

Milliampere

Definition

The Milliampere (mA) is a unit of electric current equal to one-thousandth of an ampere (0.001 A), representing small current flows. It is widely used in electronics, medical devices, and low-power applications where precise measurement of small currents is essential for circuit design and device operation.

History/Origin

The milliampere became important with the development of electronic devices and medical equipment requiring precise measurement of small currents. The metric prefix "milli" (meaning one-thousandth) was applied to the ampere to create a practical unit for expressing currents in microelectronics, sensors, and low-power electronic circuits.

Current Use

Milliamperes are extensively used in electronics, medical devices, sensors, microcontrollers, and low-power applications. They are essential for measuring battery drain, circuit current consumption, sensor outputs, and the operation of small electronic devices in consumer electronics, medical equipment, and industrial control systems.

Multiplier

0.001

Offset