Convert Amps to Milliamps
Type the number of amperes that you wish to convert to milliamperes.
How to Convert Amperes to Milliamperes
The ampere and milliampere are both units of electric current. By definition, 1 milliampere equals exactly 1000000 amperes. This means to convert amperes to milliamperes, you divide by 1000000.
Formula
Step-by-Step Example
Convert 5 A to milliamperes:
We need to convert amperes to milliamperes
Since 1 mA = 1000000 A, divide by 1000000
5 ÷ 1000000 = 5e-6
5 A = 5e-6 mA
Ampere to Milliampere Conversion Table
Quick reference table for common ampere to milliampere conversions. Click any value for detailed calculation.
| Amperes (A) | Milliamperes (mA) |
|---|---|
| 0.1 A | 1e-7 mA |
| 0.5 A | 5e-7 mA |
| 1 A | 1e-6 mA |
| 2 A | 2e-6 mA |
| 5 A | 5e-6 mA |
| 10 A | 1e-5 mA |
| 25 A | 2.5e-5 mA |
| 50 A | 5e-5 mA |
| 100 A | 0.0001 mA |
About These Units
Ampere (A)
The ampere (A or amp) is the SI base unit of electric current, defined by the flow of elementary charges per second. Named after physicist André-Marie Ampère. Common currents: LED 20 mA, USB 0.5-3 A, household outlet 15-20 A, electric car charger 32-80 A. Formula: I = V/R (Ohm's law).
Milliampere (mA)
A milliampere (mA) equals 0.001 amperes or 1,000 microamperes. Common for electronic devices: LED current 10-20 mA, USB 2.0 charging 500 mA, USB 3.0 up to 900 mA, fast charging 1,500-3,000 mA. Dangerous current through human body starts around 10-20 mA.
Frequently Asked Questions
How do I convert amperes to milliamperes?
To convert amperes to milliamperes, divide the value by 1000000. For example, 10 A = 1e-5 mA.
How many milliamperes are in 1 ampere?
1 ampere equals 1e-6 milliamperes.
What is the formula for amperes to milliamperes?
The formula is: mA = A ÷ 1000000.