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
| 5AM to 12AM | 7PM to 12PM | 5AM to 4PM |
| 6AM to 8AM | 8AM to 2PM | 3AM to 12AM |
| 2PM to 1PM | 4PM to 2AM | 3AM to 7AM |
| 3AM to 6PM | 2PM to 2AM | 8AM to 8PM |
| 8AM to 4PM | 4AM to 2PM | 10PM to 8AM |
| 9PM to 11PM | 8AM to 5AM | 1AM to 4AM |
