There are total 9 hours or 540 minutes from 1am to 10am. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 1PM to 9PM | 11PM to 4AM | 8AM to 5PM |
| 4PM to 3AM | 4PM to 8AM | 5PM to 4AM |
| 3AM to 1AM | 12AM to 8PM | 9PM to 8PM |
| 1AM to 12PM | 4PM to 3AM | 2PM to 3PM |
| 6AM to 3AM | 1PM to 5AM | 7AM to 5AM |
| 10AM to 5PM | 9AM to 11PM | 2AM to 11AM |
