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