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