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