If you use the entire length of an American football field endzone to endzone that is accurate. However, most people would use the length excluding the endzones which is 100 yards. Which would make it
100 yards = 91440 mm
91440 mm / 9 mm = 1/10160 of a football field
If you use the entire length of an American football field endzone to endzone that is accurate. However, most people would use the length excluding the endzones which is 100 yards. Which would make it
100 yards = 91440 mm 91440 mm / 9 mm = 1/10160 of a football field