Milliampere to Ampere Converter
1 milliampere is exactly 0.001 amperes. Convert milliamperes (mA) to amperes (A) below: type a value and the result updates as you type.
mA to A calculator
Result
Milliampere to Ampere conversion
1 mA = 0.001 Aone milliampere in amperes
1 A = 1000 mAone ampere in milliamperes
Milliampere (mA): One thousandth of an ampere. Used for electronics and 4-20 mA sensor signals.
Ampere (A): SI base unit of electric current, defined by fixing the elementary charge e = 1.602176634 × 10⁻¹⁹ C.
Source:SI Brochure, 9th edition (BIPM, 2019)
How to convert milliamperes to amperes
To convert milliamperes to amperes, multiply the number of milliamperes by 0.001.
Formula
A = mA × 0.001
Examples
- 5 mA = 5 × 0.001 = 0.005 A
- 25 mA = 25 × 0.001 = 0.025 A
- 100 mA = 100 × 0.001 = 0.1 A
Milliampere to Ampere conversion table
| Milliampere (mA) | Ampere (A) |
|---|---|
| 0.1 mA | 0.0001 A |
| 0.5 mA | 0.0005 A |
| 1 mA | 0.001 A |
| 2 mA | 0.002 A |
| 3 mA | 0.003 A |
| 5 mA | 0.005 A |
| 10 mA | 0.01 A |
| 20 mA | 0.02 A |
| 25 mA | 0.025 A |
| 50 mA | 0.05 A |
| 100 mA | 0.1 A |
| 250 mA | 0.25 A |
| 500 mA | 0.5 A |
| 1000 mA | 1 A |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many amperes are in one milliampere?
- One milliampere is exactly 0.001 amperes.
- How do I convert amperes to milliamperes?
- To convert amperes to milliamperes, multiply the number of amperes by 1000. The formula is mA = A × 1000.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 0.001 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a milliampere or a ampere?
- A ampere is 1000 times larger than a milliampere. In other words, a milliampere is exactly 1/1000 of a ampere.