There are total 18 hours or 1080 minutes from 1am to 7pm. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 4AM to 12AM | 8PM to 11PM | 8AM to 3PM |
| 2PM to 4AM | 9AM to 5AM | 2PM to 8PM |
| 6PM to 8PM | 5PM to 10AM | 4PM to 3AM |
| 5PM to 6PM | 10AM to 5PM | 11PM to 3AM |
| 1AM to 6AM | 6PM to 3AM | 10AM to 4AM |
| 3AM to 1AM | 4AM to 11PM | 10PM to 8AM |
