**Full name:** attojoule

**Plural form:** attojoules

**Symbol:** aJ

**Category type:** energy

**Scale factor:** 1.0E-18

The SI derived unit for energy is the joule.

1 joule is equal to 1.0E+18 attojoule.

Valid units must be of the **energy** type.

You can use this form to select from known units:

The SI prefix "atto" represents a factor of
10^{-18}, or in exponential notation, 1E-18.

So 1 attojoule = 10^{-18} joules.

The definition of a joule is as follows:

The joule (symbol J, also called newton meter, watt second, or coulomb volt) is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honor of the physicist James Prescott Joule (1818-1889).

attojoule to megaton [explosive]

attojoule to hartree

attojoule to gallon [UK] of automotive gasoline

attojoule to yottajoule

attojoule to dekajoule

attojoule to terajoule

attojoule to hundred cubic foot of natural gas

attojoule to terawatthour

attojoule to teraelectronvolt

attojoule to femtojoule