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