Units of Measurement
1 meter= 39.37 in (exactly)= 3.2808 ft

1 rod =1 pole =1 perch=16.5 ft (5.029 m)

1 engineer’s chain =100 ft =100 links (30.48 m)

1 Gunter’s chain= 66 ft (20.11 m) =100

Gunter’s links (lk) =4 rods=0.020 km

1 acre= 100,000 sq (Gunter’s) links =43,560ft2= 160 rods2= 10 sq (Gunter’s) chains= 4046.87m2= 0.4047 ha

1 rood=1011.5 m2=40 rods2

1 ha= 10,000 m2= 107,639.10 ft2= 2.471 acres

1 arpent =about 0.85 acre, or length of side of
1 square arpent (varies) (about 3439.1 m2)

1 statute mi= 5280 ft =1609.35 m

1 mi2= 640 acres (258.94 ha)
1 nautical mi (U.S.)= 6080.27 ft= 1853.248 m

1 fathom =6 ft (1.829 m)

1 cubit =18 in (0.457 m)

1 vara =33 in (0.838 m) (Calif.), 331 3 in (0.851 m)
(Texas), varies

1 degree=0.01745 rad=60 min =3600 s
sin 1 =0.01745241

1 rad = 57.30degree