›› Measurement unit: attoliter

Full name: attoliter

Plural form: attoliters

Symbol: aL

Alternate spelling: attolitres

Category type: volume

Scale factor: 1.0E-21

›› SI unit: cubic meter

The SI derived unit for volume is the cubic meter.
1 cubic meter is equal to 1.0E+21 attoliter.

Valid units must be of the volume type.
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The SI prefix "atto" represents a factor of 10^-18, or in scientific notation, 1E-18.

So 1 attoliter = 10^-18 liter.