Ampere (A)
The ampere (A) is the SI base unit of electric current — one coulomb of charge passing a point per second.
Amperes quantify circuit current, fuse ratings, charger output, and any flow of electric charge in conductors.
Ampere to Milliampere
Convert ampere to milliampere instantly. Type in either field — results update live.
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current Ampere Milliampere
1 ampere = 1,000 milliamperes
Unit
Unit
Conversion table
Selected A values converted to mA using the exact factor from this tool.
| A | mA |
|---|---|
| 0.01 | 10 |
| 0.1 | 100 |
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 1,000 | 1,000,000 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 A = 1000 mA
1 mA = 0.001 A
To convert ampere to milliampere, multiply by 1000.
To convert milliampere to ampere, multiply by 0.001.
Example: convert 10 A to mA
10 × 1000 = 10000 mA
About these units
Short background on the units used in this conversion.
Milliampere (mA)
The milliampere (mA) equals 0.001 ampere — the everyday unit on battery labels, LED specs, and low-power electronics.
Milliamperes appear on coin-cell datasheets, USB charging labels, and sensor current-draw specifications.
Frequently asked questions
How many milliamperes are in one ampere?
One ampere equals 1,000 milliamperes. Multiply your amperes value by 1,000 to convert to milliamperes.
What is the conversion formula?
mA = A × 1,000The reverse is
A = mA × 0.001, using the same exact factors as this converter.Is this Ampere to Milliampere converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.