Five feet and 9 inches is the equivalent of 69 inches. Since there are 12 inches to each foot, one can multiply 5 feet times 12 inches and calculate that the answer is 60. Sixty inches plus 9 inches equals 69 inches.
Five feet and 9 inches is also the equivalent of 1.75 meters, 175 centimeters, 1,752 millimeters or 1.9 yards. Any conversion can be done easily by multiplication to find an approximate answer. Simply multiply the amount to be converted by the given ratio, which can be found on a conversion table. For instance, to find 5 feet 9 inches or 69 inches in millimeters, multiply the 69 inches by the ratio of 25.4 to find that the answer equals 1,752 in millimeters.