›› SI base quantity: electric current

This category of measurement units is defined by the "electric current" type, which is an SI base quantity.


›› SI unit: ampere

The SI base unit for electric current is the ampere.


›› Convert ampere to another unit

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›› Convert between two electric current units

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›› Definition: Amp

In physics, the ampere (symbol: A, often informally abbreviated to amp) is the SI base unit used to measure electrical currents. The present definition, adopted by the 9th CGPM in 1948 is: "one ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one metre apart in vacuum, would produce between these conductors a force equal to 2 10-7 newton per metre of length".


›› Electric current units

abampere
ampere
attoampere
biot
centiampere
coulomb/second
deciampere
dekaampere
electromagnetic unit of current
electrostatic unit of current
franklin/second
gaussian electric current
gigaampere
gilbert
hectoampere
kiloampere
megaampere
microampere
milliampere
nanoampere
picoampere
siemens volt
statampere
teraampere
volt/ohm
watt/volt
weber/henry