Correction for the weight of an American Football
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How heavy is 320.01 firkins?
It's about 30,000 times as heavy as an American Football
The weight of an American Football is about 0.01006944444444 firkins.
(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 0.009722222222222 firkins and 0.01041666666667 firkins. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.