Milliampere [mA] to Ampere [A] Converter

Quick Reference

1 Milliampere (mA) = 0.001 Ampere (A)

1 Ampere (A) = 1000 Milliampere (mA)

How to Convert Milliampere to Ampere

1 mA = 0.001 A
1 A = 1000 mA

To convert Milliampere to Ampere, divide the value by 1000 (equivalently, multiply by 0.001). To convert Ampere back to Milliampere, multiply by 1000.

Example: convert 10 mA to A:
10 mA = 10 x 0.001 = 0.01 A

↔ Convert Ampere to Milliampere

Milliampere

Definition: A milliampere (mA) is a unit of electric current equal to one thousandth (10⁻³) of an ampere. It is a subunit of the base unit, the ampere, in the International System of Units (SI).

History/origin: The ampere is named after French physicist André-Marie Ampère. The milliampere, as a decimal multiple of the ampere, was naturally derived as a smaller, more convenient unit for measuring smaller currents. Its usage grew with the development of electronics.

Current use: Milliamperes are commonly used to measure small currents in electronic circuits, portable devices, sensors, and other low-power applications. It is a practical unit for specifying the current requirements and capabilities of components and circuits.

Ampere

Definition: The ampere (symbol: A) is the SI base unit of electric current. It is defined by taking the fixed numerical value of the elementary electric charge e to be 1.602176634 × 10−19 when expressed in the unit C, which is equal to A⋅s.

History/origin: The ampere is named after André-Marie Ampère, a French physicist and mathematician who is considered one of the founders of classical electromagnetism. The current definition was revised in 2019.

Current use: The ampere is fundamental to electrical engineering and electronics. It is used to measure the flow of electric current in circuits, appliances, and power systems worldwide.

Milliampere to Ampere Conversion Table

Milliampere [mA]	Ampere [A]
1 mA	0.001 A
2 mA	0.002 A
5 mA	0.005 A
10 mA	0.01 A
20 mA	0.02 A
50 mA	0.05 A
100 mA	0.1 A
200 mA	0.2 A
500 mA	0.5 A
1000 mA	1 A

Common pairs of Current

Ampere

Ampere to Milliampere Ampere to Kiloampere

Milliampere

Milliampere to Ampere Milliampere to Kiloampere

Kiloampere

Kiloampere to Ampere Kiloampere to Milliampere

Milliampere [mA] to Ampere [A] Converter

To convert Milliampere to Ampere, enter your value in the mA field above and the result in A will appear instantly. You can also use the conversion factor shown in the table on this page to calculate manually. The formula is always the same: multiply your mA value by the fixed conversion ratio to get the equivalent in A.

Our Milliampere to Ampere converter uses standardized conversion factors defined by international scientific and metrological organizations. All calculations are performed with full floating-point precision. You can also choose how many decimal places to display in the result, so you get exactly the level of detail you need.

Yes, absolutely. Simply swap the source and destination units in the converter — select A as your input unit and mA as your output unit. The same precision and standardized conversion factor applies in both directions.

Converting between Milliampere and Ampere comes up regularly in engineering, scientific research, construction, and everyday tasks that involve measurements from different unit systems. Our converter eliminates the risk of manual calculation errors and saves time whenever you need to switch between these two units.

Yes, the Milliampere to Ampere converter is completely free. No account or registration is required, and there are no usage limits. It works on any device — smartphones, tablets, and desktop computers — directly in your browser.

Milliampere and Ampere are both units used to measure the same physical quantity, but they belong to different measurement systems or represent different scales. The mathematical relationship between them is fixed and constant, which is what makes accurate conversion possible. Scroll up to see the exact conversion factor, formula, and a reference table for common values.

Milliampere [mA] to Ampere [A] Converter

Quick Reference

1 Milliampere (mA) = 0.001 Ampere (A)

1 Ampere (A) = 1000 Milliampere (mA)

How to Convert Milliampere to Ampere

1 mA = 0.001 A
1 A = 1000 mA

To convert Milliampere to Ampere, divide the value by 1000 (equivalently, multiply by 0.001). To convert Ampere back to Milliampere, multiply by 1000.

Example: convert 10 mA to A:
10 mA = 10 x 0.001 = 0.01 A

↔ Convert Ampere to Milliampere

Milliampere

Definition: A milliampere (mA) is a unit of electric current equal to one thousandth (10⁻³) of an ampere. It is a subunit of the base unit, the ampere, in the International System of Units (SI).

Ampere

Current use: The ampere is fundamental to electrical engineering and electronics. It is used to measure the flow of electric current in circuits, appliances, and power systems worldwide.

Milliampere to Ampere Conversion Table

Milliampere [mA]	Ampere [A]
1 mA	0.001 A
2 mA	0.002 A
5 mA	0.005 A
10 mA	0.01 A
20 mA	0.02 A
50 mA	0.05 A
100 mA	0.1 A
200 mA	0.2 A
500 mA	0.5 A
1000 mA	1 A

Common pairs of Current

Ampere

Ampere to Milliampere Ampere to Kiloampere

Milliampere

Milliampere to Ampere Milliampere to Kiloampere

Kiloampere

Kiloampere to Ampere Kiloampere to Milliampere