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