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