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
| 10PM to 11PM | 4AM to 3AM | 6AM to 2PM |
| 4PM to 8AM | 4AM to 9AM | 12AM to 4AM |
| 9PM to 7AM | 7AM to 9PM | 7AM to 2AM |
| 5AM to 1PM | 1PM to 5PM | 12PM to 7PM |
| 10AM to 2AM | 1PM to 11PM | 6AM to 1PM |
| 6AM to 12AM | 6PM to 8AM | 7AM to 10PM |
