Ampere to Milliampere Converter
Convert Ampere (A) to Milliampere (mA) instantly. 1 A = 1,000 mA.
Electric Current Converter
11 units available
1 A = 1,000 mA
Formula:
mA = A × 1,000With your value: 1 A = 1,000 mA
Other Ampere to Milliampere conversions
Ampere to Milliampere Conversion Table
| Ampere (A) | Milliampere (mA) |
|---|---|
| 0.5 | 500 |
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1000 | 1,000,000 |
Milliampere to Ampere Conversion Table
| Milliampere (mA) | Ampere (A) |
|---|---|
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Ampere (A)
Electric Current
Traceable to the ampere, defined by fixing the elementary charge at 1.602 176 634 × 10⁻¹⁹ C.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Milliampere (mA)
Electric Current
Traceable to the ampere, defined by fixing the elementary charge at 1.602 176 634 × 10⁻¹⁹ C.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Ampere to Milliampere
To convert from Ampere (A) to Milliampere (mA), multiply the value by 1,000.
Formula: mA = A × 1,000
Reverse: A = mA × 0.001
Step-by-Step Example
- Start with your value in Ampere. For example: 5 A
- Multiply by the conversion factor: 5 x 1,000
- The result is: 5,000 mA
About Ampere
The ampere (A) is a unit of electric current. One ampere equals 1 ampere. UnitConvertLab converts it against every other electric current unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: electric current calculations, engineering and science, education.
About Milliampere
The milliampere (mA) is a unit of electric current. One milliampere equals 0.001 amperes. UnitConvertLab converts it against every other electric current unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: electric current calculations, engineering and science, education.
Frequently Asked Questions
How many Milliampere are in 1 Ampere?
There are exactly 1,000 Milliampere in 1 Ampere. This means the conversion factor from Ampere to Milliampere is 1,000.
What is the formula to convert Ampere to Milliampere?
The formula to convert Ampere to Milliampere is: mA = A × 1,000. For example, to convert 10 Ampere to Milliampere, you would multiply 10 by 1,000.
What is a Ampere?
The ampere (A) is a unit of electric current. One ampere equals 1 ampere. UnitConvertLab converts it against every other electric current unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Milliampere?
The milliampere (mA) is a unit of electric current. One milliampere equals 0.001 amperes. UnitConvertLab converts it against every other electric current unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What are the common uses of Ampere?
The Ampere is commonly used in electric current calculations, engineering and science, education.
Related Electric Current Conversions
Cite this page
UnitConvertLab. (2026). Ampere to Milliampere converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/ampere-to-milliampere