Hours Calculator: Hours Between Two Dates and Times
Enter a start date and time and an end date and time in 24-hour format. The calculator gives the total hours, days, minutes and seconds in between.
Estimates only. Check important results before you rely on them.
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From related categoriesHow to use this calculator
- Pick the start date and enter the start time in 24-hour format.
- Pick the end date and the end time.
- Read the total hours at the top.
- See the days, minutes and seconds below.
The formula
Worked example
From 9:30 on 2 November 2026 to 17:45 on 4 November 2026 is 56 hours and 15 minutes, which is 56.25 hours or 2 days 8 hours 15 minutes.
Understanding your result
This tool spans several days. For two times on the same day with a break, use the Time Duration Calculator. Time zones and daylight saving are not applied.
When to use it
- Total hours of a project, trip or event.
- Hours between two shifts.
- Convert days and hours to decimal hours.
Assumptions and limits
The end must be after the start. Use 24-hour time: 5:45 PM is 17 and 45.
Frequently asked questions
How do I calculate hours between two dates?
Subtract the start from the end and convert the difference to hours.
What is 56 hours 15 minutes in decimals?
56.25 hours, as 15 minutes is 0.25 hours.
Does it handle overnight spans?
Yes, enter the dates and times and the days are included.
Is daylight saving considered?
No. Times are treated as plain clock time.
What if the end is before the start?
The tool asks you to put the end after the start.