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