One foot is equivalent to 12 inches, therefore 5 feet 4 inches is 64 inches. To convert feet to inches, multiply the number of feet by 12 and add any extra inches.
An example mathematical problem converting feet to inches, using 5 feet 4 inches is (12 x 5) + 4 = x or 60 + 4 = 64. Some other simple measurements used in the United States are yards and miles. Three feet, or 36 inches, is equivalent to 1 yard. A person who is 6 feet tall is 2 yards tall. A mile is 5,280 feet or 1,760 yards.