Square Measure  
144 sq. in. 1 sq. ft.
9 sq. ft. 1 sq. yard
30 1/4 sq. yds. 1 sq. rod
16 sq. rods 1 sq. chain
1 sq. rod 272 1/4 sq. ft.
1 sq. chain 4356 sq. ft.
10 sq. chains 1 acre
160 sq. rods 1 acre
4840 sq. yards 1 acre
43560 sq. ft. 1 acre
640 acres 1 sq. mile
1 section 1 sq. mile
1 Township 36 sq. miles
1 Township 6 miles squared
Linear Measure  
1 inch .0833 ft.
7.92 inches 1 link
12 inches 1 ft
1 yard 36 in.
3 ft 1 yard
25 links 16 1/2 ft.
25 links 1 rod
100 links 1 chain
16 1/2 ft 1 rod
5 1/2 yards 1 rod
4 rods 100 links
66 ft. 1 chain
80 chains 1 mile
320 rods 1 mile
5280 ft. 1 mile
1760 yards 1 mile
An Acre is
43,560 sq. ft.
165 ft. x 264 ft.
198 ft. x 220 ft.
5280 ft. x 8.25 ft.
2640 ft. x 16.50 ft.
1320 ft. x 33 ft.
660 ft. x 66 ft.
330 ft. x 132 ft.
160 sq. rods
4,840 sq. yard