Full name: femtogram
Plural form: femtograms
Category type: weight
Scale factor: 1.0E-18
The SI base unit for mass is the kilogram.
The SI derived unit for weight or force is the newton.
1 kilogram is equal to 1.0E+18 femtogram.
Valid units must be of the weight type.
You can use this form to select from known units:
The SI prefix "femto" represents a factor of 10-15, or in exponential notation, 1E-15.
So 1 femtogram = 10-15 grams-force.
femtogram to carat [metric]
femtogram to ounce
femtogram to atomic mass unit 
femtogram to firkin [butter, soap]
femtogram to tovar [Bulgaria]
femtogram to dalton
femtogram to yoctogram
femtogram to quarter [UK]
femtogram to metric ton
femtogram to keg [nails]