There are total 21 hours or 1260 minutes from 7am to 4am. In words, this duration is equal to twenty-one hours or one thousand two hundred sixty minutes.
How many hours from
| 9PM to 11PM | 9AM to 9PM | 8PM to 11PM |
| 2AM to 6AM | 11AM to 2AM | 7AM to 4PM |
| 1AM to 9AM | 11PM to 7AM | 4AM to 10PM |
| 12PM to 5AM | 9PM to 1AM | 3PM to 6PM |
| 4PM to 5AM | 6AM to 7PM | 10PM to 11PM |
| 2PM to 9PM | 2PM to 1AM | 4PM to 10PM |
