There are total 18 hours or 1080 minutes from 1am to 7pm. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 3PM to 1PM | 9AM to 5AM | 12AM to 7AM |
| 11PM to 1PM | 3AM to 9AM | 10PM to 4AM |
| 11AM to 4AM | 7AM to 7PM | 3AM to 12PM |
| 10AM to 9PM | 9AM to 3AM | 1AM to 8PM |
| 6PM to 1AM | 6AM to 8PM | 2PM to 9AM |
| 7AM to 6AM | 7PM to 8AM | 9PM to 3AM |
