Electric Current Converter

Convert amperes, milliamperes, and other current units.

Enter a value, choose the units, and see the result plus every other electric current unit.

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Milliampere → Ampere

Electric Current Converter

Convert electric current between amperes, milliamperes, microamperes, nanoamperes, kiloamperes, and the older CGS units abampere and statampere. Enter a value, choose the source unit, and the full table shows the same current in every unit at once – handy when a datasheet lists one unit and your multimeter shows another.

Current units at a glance

Unit Symbol In amperes
Kiloampere kA 1,000
Ampere A 1
Milliampere mA 0.001
Microampere µA 0.000001
Nanoampere nA 0.000000001
Abampere (biot) abA 10
Statampere statA ≈ 3.336 × 10⁻¹⁰

The ampere is an SI base unit. Since 2019 it is defined by fixing the elementary charge, so one ampere is a flow of about 6.24 × 10¹⁸ electrons per second.

Where each scale shows up

  • Microamperes and nanoamperes – sleep currents of microcontrollers, leakage currents, and sensor outputs. A coin-cell device drawing 5 µA can run for years.
  • Milliamperes – LEDs (typically 5–20 mA), USB ports (500 mA on USB 2.0, 900 mA on USB 3.0), and battery capacities in mAh.
  • Amperes – household circuits, chargers, and motors. A 16 A breaker protects a typical European socket circuit.
  • Kiloamperes – lightning strikes, welding, and short-circuit ratings of industrial switchgear.

Worked example

A phone charger datasheet lists 2,400 mA. Enter 2400, choose milliampere, and read 2.4 A in the ampere row. Going the other way, a 0.02 A LED current is 20 mA.

Current is only one part of an electrical calculation. To size a power supply, combine the current with the voltage and use the Power Converter; for battery energy in watt-hours, see the Energy Converter.

Frequently Asked Questions

One ampere equals 1,000 milliamperes (mA) and 1,000,000 microamperes (µA). To go from mA to A, divide by 1,000: 500 mA = 0.5 A.

The abampere (or biot) is the unit of current in the old CGS electromagnetic system. One abampere equals exactly 10 amperes.

No. Watts measure power, which also depends on voltage (P = V × I). Current units can only be converted into other current units. Use the Power Converter once you know the wattage.