How to use this calculator
Find elapsed hours and minutes between two clock times. If the end time is earlier, it is treated as the next day.
Formula
Duration = End time − Start time
Example
From 9:15 AM to 1:45 PM is 4 hours 30 minutes, or 4.5 decimal hours.
Frequently asked questions
Can the duration cross midnight?
Yes. For example, 10:00 PM to 2:00 AM is four hours.