Electrical
mAtoA
Convert milliamperes (mA) to amperes (A).
Factor1 mA = 0.001 A
Converter
mA
Accepts numbers or expressions, e.g. 150 + 14.7
Result
A
Rendered to 6 significant figures.
Formula
Formula
A = mA × 0.001
Multiply any value in milliamperes by 0.001 to obtain the value in amperes.
Worked example
Convert 500 mA to A.
- 01Start with 500 mA.
- 02Multiply by the conversion factor: 500 × 0.001 = 0.5 A.
Result500 mA = 0.5 A
Conversion table
| mA | A |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mA to A?
1 mA equals 0.001 A. To convert, multiply the value in milliamperes by 0.001.
How do I convert 1 mA to A?
1 mA = 0.001 A. For any value, multiply by 0.001.
How do I convert A back to mA?
Divide by the same factor — or equivalently, multiply by 1000. So 1 A = 1000 mA.
When would I need to convert milliampere to ampere?
Current conversions between mA and A appear in motor and cable sizing, instrumentation loop design (4–20 mA), battery characterisation and electronics. Amperes are standard for power circuits; milliamperes and microamperes are the working units for signal conditioning and sensor outputs.
Is the conversion exact?
Yes. Both mA and A are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).