Convert amps to milliamps
1 ampere equals 1,000 milliamperes. Enter a value below to convert instantly.
Need the other direction? Convert milliampere to ampere →
Formula
Multiply the number of amperes by 1000 to get milliamperes.
Step by step
- Start with 1 A.
- Multiply by the conversion factor 1000.
- 1 × 1000 = 1,000 mA.
Amperes to Milliamperes conversion table
| Amperes (A) | Milliamperes (mA) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
Convert Ampere to other electric current units
1 A expressed in every other electric current unit on this site.
- Ampere A 1
- Kiloampere kA 0.001
- Megaampere MA 0.000001
- Milliampere mA 1,000
- Microampere µA 1,000,000
- Nanoampere nA 1,000,000,000
- Picoampere pA 1,000,000,000,000
- Abampere abA 0.1
- Statampere statA 2,997,924,500
- Coulomb per Second C/s 1
- Gilbert Gi 1.2566371
About the ampere
The ampere (A) is a SI unit of electric current. The SI base unit of current, fixed by the elementary charge e = 1.602176634 × 10⁻¹⁹ C.
About the milliampere
The milliampere (mA) is a SI unit of electric current.
Where this conversion is used
Converting amperes to milliamperes comes up when electronics, wiring, and power systems.
Related conversions
Frequently asked questions
How many milliamperes are in a ampere?
One ampere equals 1,000 milliamperes.
How do you convert amperes to milliamperes?
Multiply the number of amperes by 1000 to get milliamperes.
What is 1 milliampere in amperes?
One milliampere equals 0.001 amperes.
When would I convert amperes to milliamperes?
This conversion is common when electronics, wiring, and power systems.
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.