Linear Measure

 12 inches (in.)......................= 1 foot ......................... ft. 3 feet ...................................= 1 yard.......................... Yd. 5.5 yards ............................... = 1 rod ........................... rd. 40 rods....................................= 1 furlong..................... fur, 8 furlongs............................ = 1 mile ........................ mi.
 in. ft. yd. rd. fur. mi. 36 = 3 = 1 198 = 16.5 = 5.5 = 1 7,920 = 660 = 220 = 40 = 1 63,360 = 5,280 - 1,760 = 320 = 8 = 1

Surveyor's Measure

 7.92 inches................................= 1 link .......................... li. 25 links................................... = l rod.............................. rd. 4 rods 100 links ............................ = 1 chain ........................ ch. 66 feet 80 chains ............................... = l mile............................ mi. l mi. = 80 ch. = 320 rd. = 8,000 li. == 63,360 in.

Square Measure

 144 square inches (sq. in.).......= 1 square foot.............sq. ft. 9 squarefeet.........................= 1 square yard......... Sq. yd. 30 1/4 square yards...................... = 1 square rod ........... sq. rd. 160 square rods ......................= 1 acre .................... ........A. 640 acres.................................................= 1 square mile........ sq. mi.
 sq. mi. A. sq. rd. yd ft. sq. in. 1 - 640 - 102,400 = 3,097,600 = 27,878,400 = 4,014,489,600