Formula
A to mA conversion formula
Use this relationship for a direct conversion:
mA = A x 1,000
Worked example
2 A = 2,000 mA.
SI prefix relationships are exact.
Electric Current conversion
Convert Ampere to Milliampere
1 ampere (A) equals 1,000 milliampere (mA). Enter any value below to convert from A to mA.
Enter a value and choose units. Results update instantly.
1 A = 1,000 mA
All Current units
From 1 A| Unit | Value |
|---|---|
| Nanoampere nA | 999,999,999.9999998808 |
| Microampere μA | 1,000,000 |
| Milliampere mA | 1,000 |
| Ampere A | 1 |
| Kiloampere kA | 0.001 |
| Abampere abA | 0.1 |
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Quick reference
Ampere to Milliampere table
| Ampere (A) | Milliampere (mA) |
|---|---|
| 0.01 | 10 |
| 0.1 | 100 |
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 1,000 | 1,000,000 |
From unit
About the ampere
The SI base unit of electric current.
Symbol: A
To unit
About the milliampere
One thousandth of an ampere.
Symbol: mA
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Source
Conversion standard
Definitions are checked against BIPM SI Brochure: ampere. Calculations use full internal precision before display rounding.
View the complete electric current converterQuestions
A to mA FAQ
How do you convert ampere to milliampere?
Use the formula mA = A x 1,000. 1 ampere (A) equals 1,000 milliampere (mA).
Is the A to mA conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.