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