## Measurement unit: attowatt

**Full name:** attowatt

**Plural form:** attowatts

**Category type:** power

**Scale factor:** 1.0E-18

## SI unit: watt

The SI derived unit for power is the watt.

1 watt is equal to 1.0E+18 attowatt.

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

You can use this form to select from known units:

## Definition: Attowatt

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

So 1 attowatt = 10^{-18} watts.

The definition of a watt is as follows:

The watt (symbol: W) is the SI derived unit for power. It is equivalent to one joule per second (1 J/s), or in electrical units, one volt ampere (1 V·A).

## Sample conversions: attowatt