Current Converter
Convert an electric current between amperes, milliamperes, microamperes and kiloamperes - useful for circuits, chargers and fuses.
About the Current Converter
This tool converts electric current between microamperes, milliamperes, amperes and kiloamperes. Current measures the flow of electric charge, and these prefixed units span tiny circuit currents through to the large currents in industrial and power systems.
How to use it
- Enter the value you have into its field, such as an LED current in milliamperes.
- Read the equivalent in amperes, microamperes or kiloamperes.
- Convert either way when a component rating uses a different prefix.
The prefixes step by factors of 1000: 1 A is 1000 mA and 1,000,000 uA, while 1 kA is 1000 A. This is useful when a microcontroller pin is rated in milliamps but a power calculation is in amps, or when comparing a fuse rating to a measured draw. Current relates to voltage and resistance through Ohm's law (I = V / R), though this tool only converts the current unit itself. Everything is computed locally in your browser, so your figures are never uploaded.
Frequently asked questions
How many milliamps are in an amp?
One ampere equals 1000 milliamperes (mA) and 1,000,000 microamperes (uA). A kiloampere is 1000 amperes.
How do I convert milliamps to amps?
Divide milliamps by 1000. So a 500 mA charger supplies 0.5 A, and a 2000 mA draw is 2 A.
What is a kiloampere used for?
Kiloamperes describe very large currents, such as short-circuit fault currents in power systems or the rated breaking capacity of circuit breakers.
How is current related to voltage and resistance?
By Ohm's law, current equals voltage divided by resistance (I = V / R). This converter only changes the unit of current, so use Ohm's law separately to calculate the current itself.