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Electric Current Converter

Convert between different units of electric current including amperes (A), milliamperes (mA), and microamperes (µA). Perfect for electronics, electrical engineering, and circuit design.

Converted current
1 A equals
1,000.000000 mA
Amperes (A)
1.000000 A
Milliamperes (mA)
1,000.000000 mA
Microamperes (µA)
1,000,000.000000 µA

Converts through amperes using 1 mA = 0.001 A and 1 µA = 0.000001 A.

Results update as you type.

Electric Current Converter

Convert current between amperes, milliamperes, and microamperes. Enter the Value, choose the From unit, choose the To unit, and the calculator returns the converted current plus equivalents in every supported unit. It is handy for electronics datasheets, chargers, sensors, microcontroller sleep modes, LEDs, and battery-life estimates.

Conversion formula

The converter uses amperes as the base unit:

1 mA=0.001 A1\ \text{mA} = 0.001\ \text{A}

1 μA=0.000001 A1\ \mu\text{A} = 0.000001\ \text{A}

To convert, multiply by the source factor to get amperes, then divide by the target factor. For example, 250 mA × 0.001 = 0.25 A. The same current is 250,000 µA because 0.25 ÷ 0.000001 = 250,000.

Current, voltage, and resistance

Current is related to voltage and resistance by Ohm’s law:

I = V / R
CurrentEquivalent
1 A1,000 mA
1 mA1,000 µA
50 µA0.05 mA

For complete circuit checks, use the ohms law calculator, power converter, or electricity cost calculator. Follow proper safety practices for mains and high-current systems.

Frequently asked questions

How many milliamperes are in 1 ampere?
1 ampere equals 1,000 milliamperes. The calculator converts through amperes.
How many microamperes are in 1 milliampere?
1 milliampere equals 1,000 microamperes, and 1 microampere equals 0.000001 amperes.
What is 250 mA in amperes?
250 mA equals 0.25 A because milliamperes are one-thousandth of an ampere.
Does a 2 A power supply force 2 A into a device?
No. A current rating is the maximum available current under rated conditions; the device draws what its circuit requires if voltage and polarity are correct.

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