›› Measurement unit: attometre

Full name: attometre

Plural form: attometers

Symbol: am

Alternate spelling: attometres

Category type: length

Scale factor: 1.0E-18

›› SI unit: metre

The SI base unit for length is the metre.
1 metre is equal to 1.0E+18 attometre.

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

So 1 attometre = 10^-18 metre.