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