There are total 19 hours or 1140 minutes from 1am to 8pm. In words, this duration is equal to nineteen hours or one thousand one hundred forty minutes.
How many hours from
| 1PM to 10AM | 10AM to 5PM | 10AM to 8PM |
| 1AM to 6PM | 2PM to 11AM | 12PM to 8AM |
| 1PM to 7AM | 2AM to 5PM | 10AM to 9AM |
| 11AM to 3PM | 7PM to 7AM | 2AM to 8AM |
| 10AM to 4PM | 9AM to 10PM | 4PM to 7AM |
| 7PM to 8AM | 10AM to 1PM | 8AM to 1PM |
