There are total 15 hours or 900 minutes from 10am to 1am. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 9AM to 10PM | 2AM to 3PM | 12PM to 1AM |
| 4PM to 5PM | 6AM to 8PM | 2PM to 1PM |
| 6PM to 12AM | 4AM to 1AM | 11PM to 3PM |
| 2PM to 10PM | 8PM to 10PM | 1PM to 7AM |
| 3PM to 11PM | 5PM to 3PM | 4AM to 6AM |
| 10PM to 8AM | 7PM to 5AM | 5AM to 6AM |
