Please specify- what football game are you talking about?
60 minutes of playing; 15 for each quarter
A football game consists of 4 quarters, Each quarter is split into 2 halves, which last 30 minutes. This means that the length of a football game is approximately 60 minutes.
A junior high football game usually last around 48 minutes.
About a day
An average NFL game is 3 hours
It lasts 90 minutes.