What is the Date & Time Difference?
When a flight leaves Lahore at 3:40 am PKT and lands in London at 8:15 am GMT, how long was the journey? The date and time difference calculator answers questions like this by letting each date-time have its own time zone.
It shows the duration as days + hours + minutes and as totals in hours, minutes and seconds. For whole days between dates use the Date Difference Calculator; to convert a single time between cities use the Time Zone Converter.
How to use the Date & Time Difference
- Enter the start date and time and its time zone.
- Enter the end date and time and its time zone.
- Read the exact difference and the totals.
Formula
Difference = end (converted to UTC) − start (converted to UTC)
Example
Departing Lahore 03:40 PKT and arriving London 08:15 GMT the same day is a journey of 9 hours 35 minutes (575 minutes).
Where this is useful
- Flight and travel durations
- Contract and project deadlines across countries
- Shift and overtime records
- Server logs and support response times
- Online exam windows for international students
Totals vs calendar breakdown
The result is shown two ways. The breakdown (for example 2 days 5 hours 30 minutes) is easiest to read. The totals (53.5 hours, 3,210 minutes) are what you need for billing, overtime and spreadsheets. For durations in hours and minutes only, without dates, the Time Calculator is quicker.
You may also need
People who use the Date & Time Difference often need these related tools too:
- Date Calculator (Add or Subtract Days): Add or subtract days, weeks, months, years or working days from any date, with quick buttons for 30, 60 and 90 days from today.
Frequently asked questions
How do I calculate hours between two dates?
Enter both date-times; the total hours appear under the result.
Does it handle daylight saving?
Yes. Each time zone's daylight saving rules are applied automatically.
Can the end be before the start?
Yes. The result is shown as a negative duration.
What is the difference from the date difference calculator?
This one includes times and time zones; the date difference calculator counts whole days, weeks and months.
Are seconds included?
Yes, totals are shown in seconds too.
Is the Date & Time Difference free to use?
Yes. The Date & Time Difference on Custom Converter is completely free, with no sign-up, no daily limit and no watermark.
Does the Date & Time Difference work on mobile phones?
Yes. It is built mobile-first and works on Android phones, iPhones, tablets and computers in any modern browser, with no app to install.