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