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