**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 femtojoule

attojoule to inch-pound

attojoule to tonne of coal equivalent

attojoule to megacalorie [I.T.]

attojoule to wattsecond

attojoule to gallon [UK] of aviation gasoline

attojoule to gigacalorie [I.T.]

attojoule to kilopond meter

attojoule to gallon [UK] of diesel oil

attojoule to millijoule