There are total 7 hours or 420 minutes from 9pm to 4am. In words, this duration is equal to seven hours or four hundred twenty minutes.
How many hours from
| 9AM to 10AM | 3AM to 12PM | 1AM to 7PM |
| 2PM to 9PM | 6AM to 7AM | 5AM to 6PM |
| 2PM to 10AM | 2AM to 7AM | 11AM to 8AM |
| 4PM to 3AM | 5AM to 4PM | 3PM to 6PM |
| 7AM to 4PM | 2AM to 9AM | 3PM to 6PM |
| 3PM to 6AM | 7PM to 6AM | 4AM to 3PM |
