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