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