There are total 7 hours or 420 minutes from 1pm to 8pm. In words, this duration is equal to seven hours or four hundred twenty minutes.
How many hours from
| 6AM to 1PM | 5AM to 8PM | 9AM to 4PM |
| 11AM to 3PM | 6PM to 4AM | 11PM to 6AM |
| 7AM to 7PM | 7PM to 9AM | 9AM to 9PM |
| 3AM to 9PM | 12PM to 5PM | 2PM to 11PM |
| 6AM to 1PM | 10AM to 4AM | 10PM to 5PM |
| 8PM to 4PM | 8PM to 2PM | 11AM to 6AM |
