Full name: zeptometre
Plural form: zeptometers
Symbol: zm
Alternate spelling: zeptometres
Category type: length
Scale factor: 1.0E-21
The SI base unit for length is the metre.
1 metre is equal to 1.0E+21 zeptometer.
Valid units must be of the length type.
You can use this form to select from known units:
The SI prefix "zepto" represents a factor of 10-21, or in exponential notation, 1E-21.
So 1 zeptometre = 10-21 metre.