**Full name:** attobar

**Plural form:** attobars

**Category type:** pressure

**Scale factor:** 1.0E-13

The SI derived unit for pressure is the pascal.

1 pascal is equal to 10000000000000 attobar.

Valid units must be of the **pressure** 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 attobar = 10^{-18} bars.

The definition of a bar is as follows:

The bar is a measurement unit of pressure, equal to 1,000,000 dynes per square centimetre (baryes), or 100,000 newtons per square metre (pascals). The word bar is of Greek origin, báros meaning weight. Its official symbol is "bar"; the earlier "b" is now deprecated, but still often seen especially as "mb" rather than the proper "mbar" for millibars.

attobar to foot of head

attobar to millimeter of mercury [0 °C]

attobar to newton/square metre

attobar to newton/square millimetre

attobar to micrometer of water [4 °C]

attobar to hectopascal

attobar to inch of water [4 °C]

attobar to inch water [4 °C]

attobar to micrometer of mercury [0 °C]

attobar to ounce/square inch