6:00 AM to 1:00 PM

How many hours between 6am to 1pm?

7 hours

How many minutes between 6am to 1pm?

420 minutes

How many hours between:

4pm to 11am
10pm to 9am
9pm to 2am
6pm to 12pm
11pm to 1pm
6pm to 10am
5am to 9pm
11am to 7am
7am to 11pm
2pm to 4pm
3am to 7pm
10pm to 2am
2pm to 11am
9pm to 12pm
7pm to 10pm
12pm to 4pm
3am to 9am
7pm to 5pm
8pm to 2am