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