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