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