**Full name:** ampere

**Plural form:** amperes

**Symbol:** A

**Alternate spelling:** amps

**Category type:** electric current

**Scale factor:** 1

The SI base unit for electric current is the ampere.

1 ampere is equal to 1 amp.

Valid units must be of the **electric current** type.

You can use this form to select from known units:

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".

amp to coulomb/second

amp to ampere

amp to microampere

amp to centiampere

amp to statampere

amp to attoampere

amp to nanoampere

amp to electromagnetic unit of current

amp to gaussian electric current

amp to abampere