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