There are total 7 hours or 420 minutes from 9am to 4pm. In words, this duration is equal to seven hours or four hundred twenty minutes.
How many hours from
| 4AM to 5AM | 11AM to 7PM | 12AM to 4AM |
| 6AM to 1AM | 1AM to 6PM | 8PM to 12AM |
| 12AM to 7AM | 4AM to 7AM | 11AM to 5PM |
| 6AM to 3AM | 4PM to 12PM | 3AM to 7AM |
| 7PM to 7AM | 11PM to 6PM | 9PM to 5PM |
| 4AM to 12AM | 10AM to 12AM | 8AM to 1PM |
