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