There are total 21 hours or 1260 minutes from 4pm to 1pm. In words, this duration is equal to twenty-one hours or one thousand two hundred sixty minutes.
How many hours from
| 2AM to 12AM | 5PM to 9AM | 2PM to 10AM |
| 7PM to 8PM | 7AM to 1PM | 12AM to 7AM |
| 7PM to 2PM | 8AM to 4PM | 2AM to 5PM |
| 5AM to 5PM | 9PM to 7PM | 5AM to 5PM |
| 10AM to 12PM | 7PM to 6AM | 7AM to 8PM |
| 2PM to 11AM | 6AM to 12PM | 4PM to 11PM |
