<Tr> <Td> American football </Td> <Td> 12 (professional) or 20 (college) minutes </Td> <Td> Two 15 minute quarters . Each half is 30 minutes . In IFAF, two 12 - minute quarters, with each half at 24 minutes . </Td> </Tr> <Tr> <Td> Association football </Td> <Td> 15 minutes </Td> <Td> 45 minutes plus stoppage time </Td> </Tr> <Tr> <Td> Australian rules football </Td> <Td> 20 minutes </Td> <Td> Two periods (quarters) of 20 minutes plus stoppage time </Td> </Tr> <Tr> <Td> Bandy </Td> <Td> ≤ 20 minutes </Td> <Td> 45 minutes plus injury time, replacement time etc . </Td> </Tr>

How long is the break at halftime in football