Amperes (A)	Milliamperes (mA)
1 A	1000 mA
2 A	2000 mA
5 A	5000 mA
10 A	10000 mA
25 A	25000 mA
50 A	50000 mA
100 A	100000 mA
250 A	250000 mA
500 A	500000 mA
1000 A	1000000 mA

Electric Current Unit Conversions

Free online electric current converter. Instantly convert between Amperes, Milliamperes, Microamperes, Kiloamperes, Ampere-hours, and more with exact scientific formulas.

Understanding Electric Current Conversions

The standard SI base unit of electric current is the ampere (A), defined by taking the fixed numerical value of the elementary charge e to be 1.602176634 × 10⁻¹⁹ coulombs per second.

Supported Electric Current Units (8 Units)

Ampere (A) (Base SI unit of electric current (1 C/s)) — Primary SI / Base Reference Unit
Milliampere (mA) (Electronics & microcontroller circuits) — 1 mA = 0.001 A
Microampere (µA) (Low-power standby & IoT sensors (10⁻⁶ A)) — 1 µA = 0.000001 A
Kiloampere (kA) (Power grids & lightning discharges) — 1 kA = 1000 A
Ampere-hour (Ah) (Battery capacity over 1 hour (3,600 C)) — 1 Ah = 1 A
Milliampere-hour (mAh) (Phone, laptop & power bank battery capacity) — 1 mAh = 0.001 A
Abampere (Biot) (abA) (10 Amperes (Electromagnetic CGS unit)) — 1 abA = 10 A
Statampere (statA) (Electrostatic CGS unit (~0.334 nA)) — 1 statA = 0 A

Popular Electric Current Conversions

Ampere ⇄ Milliampere

1 ampere (A) equals exactly 1,000 milliamperes (mA).

Milliampere ⇄ Ampere

Divide milliamperes by 1,000 to convert to amperes (500 mA = 0.5 A).

Milliampere-hour ⇄ Ampere-hour

Divide milliampere-hours by 1,000 to convert battery capacity to ampere-hours (5,000 mAh = 5 Ah).

Ampere-hour ⇄ Milliampere-hour

Multiply ampere-hours by 1,000 to get battery capacity in milliampere-hours (mAh).

Microampere ⇄ Milliampere

1 milliampere contains 1,000 microamperes (µA).

Frequently Asked Questions

Common questions and verified calculations for electric current units.

How do you convert mAh (milliampere-hours) to Ah (ampere-hours)?

To convert mAh to Ah, divide the mAh rating by 1,000. For example, a 5,000 mAh smartphone battery or power bank has a capacity of 5 Ah (5,000 ÷ 1,000 = 5 Ah).

What is the difference between Amperes (A) and Ampere-hours (Ah)?

Amperes (A) measure instantaneous electric current (the rate of electron flow), while Ampere-hours (Ah) measure total electric charge storage or battery capacity over time (1 Ah = 3,600 coulombs).

How many milliamperes are in 1 Ampere?

There are exactly 1,000 milliamperes (mA) in 1 Ampere (A). Microcontrollers like Arduino typically consume between 20 mA and 50 mA during normal operation.