Electric Current Converter
Convert between amperes, milliamperes, microamperes and kiloamperes.
Formula and sources updated · Data sources · 1View algorithm, constants and default inputs (JSON)
1 A = 1,000 mA
About this calculator
Current is the rate of electric charge flow and is measured in amperes (1 A = 1 C/s). Values range from microamperes in small electronics to many amperes in power circuits; select units that match your measurement.
Worked example
calculated with the default values below
Value 1 · From Milliamperes (mA) · To Amperes (A) · Decimal places 4 Result 0.001 · Amperes 0.001000 A · Milliamperes 1.000 mA · Charge per second 0.001000 C/s
Method and assumptions
Formula basis and scope
Convert electric current via amperes and SI prefixes.
Only the displayed unit definitions are converted; rounding and measurement uncertainty are separate.
Data sources
Disclaimer
These calculators give general conversion results. Rounding and the precision of the value you enter both affect the output, so treat displayed decimals as indicative rather than exact.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
I_out = I_in × f_in ÷ f_out
- I_in
- Input current
- f_in
- Source factor in amperes (A 1, mA 10⁻³, µA 10⁻⁶, kA 10³)
- f_out
- Target factor
- I_out
- Converted current
All factors are relative to the ampere (microampere µA); pure unit conversion.
Frequently asked questions
Why does charge per second equal the value in amperes?
One ampere is defined as one coulomb of charge flowing per second, so the Charge per second output is simply the current expressed in amperes. Converting from milliamps multiplies by 0.001 and from microamps by one millionth. A reading of 1,000 mA therefore shows 1 C/s, and 500 µA shows 0.0005 C/s, which keeps the unit honest across all four scales.