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