Equivalents of 171 centimeters are approximately 67.3 inches, 5.6 feet and 1.9 yards. Other equivalents are 1.71 meters and 1,710 millimeters. Inches, feet and yards are all units of length in the U.S. System of Customary Units, while meters, centimeters and millimeters are units of length in the metric system.
One inch is equal to 2.54 centimeters, so converting 171 centimeters to inches requires dividing 171 centimeters by 2.54 centimeters per inch. To convert that answer, 67.3 inches, to feet requires dividing it by 12 inches per foot. Dividing that result by 3 feet per yard gives the equivalent in yards.