From reference 1:
"A football field (including the two end zones) is 360 feet long and 160 feet wide for a total of 57,600 square feet. When you take away the two 30-foot-long end zones at each end, the field is 48,000 square feet, making an acre about 91% of the field.
An acre, which is a common measurement of land area, is equal to 43,560 square feet."
· 1 decade ago