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