The following tables will help convert common standards of measurements.
SQUARE MEASURE
144 sq. in. = 1 sq. ft.
9 sq. feet = 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. ch. = 4356 sq. ft.
10 sq. chs. = 1 acre
160 sq. rods = 1 acre
4840 sq. yds. = 1 acre
43560 sq. ft. = 1 acre
640 acres = 1 sq. mile
1 section = 1 sq. mile
1 Twp. = 36 sq. miles
1 Twp. = 6 miles sq.
LINEAR MEASURE
1 inch = .0833 ft.
7.92 inches = 1 link
12 inches = 1 foot
1 vara = approx. 33 in.
2 3/4 feet = approx. 1 vara
3 feet = 1 yard
25 links = 16 1/2 feet
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 feet = 1 chain
80 chains = 1 mile
320 rods = 1 mile
5280 feet = 1 mile
1760 yards = 1 mile
AN ACRE IS
43,560 sq. ft.
165 feet x 264 feet
198 feet x 220 feet
5280 feet x 8.25 feet
2640 feet x 16.50 feet
1320 feet x 33 feet
660 feet x 66 feet
330 feet x 132 feet
160 square rods
208'8 1/2" square or 208.71033 feet square,
(208.71033) 2 = 43,560.002 sq. ft.
or any rectangular tract, the product of the length and width of which totals 43,560.002 sq. ft.