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