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