
Gradus (length)
    
    Encyclopedia
    
        A gradus is an ancient Roman unit of length that is 2.5 pedes
. One gradus is 0.81 yard
s or 0.74 meters. There are 2 gradi in one passus.
Pes (length)
A pes  is an ancient Roman unit of length that roughly corresponds to a foot.  There are twelve unciae in one pes.  One pes is 11.6 inches or 29.5 centimeters.  There are 2.5 pedes in one gradus....
. One gradus is 0.81 yard
Yard
A yard  is a unit of length in several different systems including English units, Imperial units and United States customary units. It is equal to 3  feet or 36 inches...
s or 0.74 meters. There are 2 gradi in one passus.


