Electricity converters
Current Converter
Convert electric current units: ampere, milliampere, abampere and statampere.
Result
0.5 A
500 mA = 0.5 A
All units for this value
| Unit | Symbol | Value |
|---|---|---|
| Ampere | A | 0.5 |
| Kiloampere | kA | 0.0005 |
| Megaampere | MA | 5.00000e-7 |
| Milliampere | mA | 500 |
| Microampere | µA | 500000 |
| Nanoampere | nA | 500000000 |
| Picoampere | pA | 500000000000 |
| Coulomb per second | C/s | 0.5 |
| Abampere | abA | 0.05 |
| Biot | Bi | 0.05 |
| Statampere | statA | 1498960000 |
About this calculator
Electric current measures the rate at which charge flows past a point in a circuit, most commonly expressed in amperes. This converter switches between the SI ampere and its metric multiples, the equivalent coulomb-per-second unit, and CGS units like the abampere, biot, and statampere.
How it works in plain English
Current is defined as charge flow per unit time, and the converter anchors every unit to the ampere, which is itself identical to one coulomb of charge passing per second. Metric multiples such as kiloampere, megaampere, milliampere, microampere, nanoampere, and picoampere follow the standard powers-of-ten pattern used throughout SI units.
The coulomb-per-second unit is included as a direct reminder that the ampere is defined this way rather than as an independent unit needing its own conversion factor; it converts one-to-one with the ampere. The CGS abampere and biot are both equal to exactly 10 amperes, reflecting a historical naming overlap between two closely related unit systems, while the statampere is a much smaller unit equal to about 3.336 × 10⁻¹⁰ amperes, matching the same electrostatic scale convention used for the statcoulomb.
Select your from and to units, enter a current value, and the converted result appears immediately, with a table showing that same current across every supported unit. A precision selector controls how many decimal places are shown, and a swap button reverses the two chosen units in one click.
The formula
- value_in_target = value_in_source × (source factor to amperes) ÷ (target factor to amperes)
- 1 milliampere (mA) = 0.001 amperes
- 1 abampere (abA) = 1 biot (Bi) = 10 amperes
- 1 statampere (statA) ≈ 3.335640951981521 × 10⁻¹⁰ amperes
Worked example
Suppose a circuit design calls out a current of 250 milliamperes and someone needs that figure in amperes to plug into a formula that expects SI base units. Multiplying by the milliampere factor: 250 × 0.001 = 0.25 amperes. As a sanity check, multiplying that ampere value back by 1000 recovers the original 250 mA, confirming the decimal shift was applied in the right direction.
Entering 250 into the milliampere field with ampere selected as the target returns 0.25 A right away. The accompanying unit table also lists that same current as 250,000 microamperes, 0.00025 kiloampere, and 0.025 abampere, all calculated automatically from the single entered value.
Electric current unit reference values
| Unit | Value in amperes |
|---|---|
| 1 kiloampere (kA) | 1,000 |
| 1 milliampere (mA) | 0.001 |
| 1 microampere (µA) | 0.000001 |
| 1 abampere (abA) | 10 |
| 1 biot (Bi) | 10 |
| 1 statampere (statA) | 3.335640951981521 × 10⁻¹⁰ |
Standard SI and CGS unit definitions
Frequently asked questions
Why does the coulomb-per-second unit convert one-to-one with the ampere?
Because the ampere is defined as the flow of one coulomb of charge past a point every second, so the two units describe exactly the same physical quantity by definition. Including coulomb per second in this converter simply makes that relationship explicit rather than requiring it to be remembered separately.
Why are the abampere and the biot the same size?
Both units emerged from the same CGS electromagnetic tradition and were each defined to equal 10 amperes, though they arose in slightly different historical contexts and disciplines. This converter treats them identically since they represent the same magnitude of current.
How does the statampere relate to the statcoulomb?
The statampere is defined so that one statampere flowing for one second delivers one statcoulomb of charge, mirroring the same relationship between the ampere and the coulomb. Since the statcoulomb is a very small unit of charge, the statampere works out to a correspondingly small unit of current.
What's a typical current value for household electronics?
Small electronic devices often draw currents in the tens to hundreds of milliamperes, while larger household appliances can draw several amperes. This converter is useful for translating datasheet figures given in milliamperes or microamperes into amperes for circuit calculations, or the reverse.
Can I convert a current reading in microamperes into abamperes?
Yes. Select microampere as the from unit and abampere as the to unit, then enter the measured value. The converter passes the figure through the shared ampere base automatically, handling the very different scales of the two units without manual calculation.
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