There are total 18 hours or 1080 minutes from 1pm to 7am. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 7PM to 8AM | 10AM to 5PM | 3AM to 7PM |
| 3PM to 6AM | 8PM to 7AM | 11PM to 9AM |
| 7PM to 6AM | 4PM to 8PM | 12PM to 12AM |
| 9PM to 5PM | 10PM to 1AM | 8AM to 10AM |
| 7AM to 8PM | 11PM to 10AM | 1PM to 7AM |
| 11PM to 1PM | 8PM to 9PM | 7PM to 3PM |
