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