About this calculator
Enter the start and end dates and times in 24-hour format.
How to use it
- Enter the start date and time.
- Enter the end date and time.
- Read the difference.
The formula
Difference = (end date and time) − (start date and time)
- 24-hour time
- for example 18:15 for 6:15 pm
Worked example
From 3 October, 9:30 am to 4 October, 6:15 pm
- That is 1 day 8 hours 45 minutes.
- = 32.75 hours, or 1,965 minutes.
What the result means
For work shifts with breaks, the working hours calculator subtracts the break for you.
Assumptions
- Both times are in the same time zone.
Limitations
- Daylight saving changes are not applied; India does not use them.
Frequently asked questions
How do I calculate hours between two times?
Subtract the start from the end; if the end is the next day, add 24 hours.
What is 9:30 to 18:15?
8 hours 45 minutes.
Can it handle different time zones?
Use the time zone converter first, then compare.
Last reviewed on 3 October 2026. Found a mistake? Tell us.