The equivalent of 100 yards, which is the length of a football field from goal line to goal line, is about 300 feet. One yard is equal to 3 feet. Given that 36 inches make up a yard, 100 yards is composed of 3,600 inches.
Inches, feet and yards are U.S. customary units of length derived from the imperial system of measurement. This system is used primarily in the United States. The metric system uses units such as the millimeter, centimeter and meter to measure length. The equivalent of 100 yards in the metric system is 91.44 meters because one yard is equal to 0.9144 meters.