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