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