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