What happens when the end is before the start?

The tool shows the absolute duration and marks that the dates were reversed; it does not return a negative interval.

What is the difference between the calendar breakdown and total days?

Years and months follow calendar boundaries, whose lengths vary. Total days, hours, and minutes measure the elapsed timestamp difference.

Does Time only calculate across midnight?

Both times are placed on the current date. If the second time is earlier, the tool shows the absolute same-day difference rather than assuming the next day.

Date & Time Duration Calculator

LocalFree

Pick (or type) a start and end date/time and see the exact duration between them - in days, weeks, hours, and minutes.

Date & timeTime only

Input

From

Total duration

Years

Months

Days

HH:MM:SS

00:00:00

Total weeks

Total days

Total hours

Total minutes

Runs in your browser; files and input stay on this device

How to use Date & Time Duration Calculator

1Choose Date & time or Time only.
2Enter the start and end values, or use the Now and Swap actions.
3Read the calendar breakdown and elapsed totals as the values change.

Frequently asked questions

What happens when the end is before the start?: The tool shows the absolute duration and marks that the dates were reversed; it does not return a negative interval.
What is the difference between the calendar breakdown and total days?: Years and months follow calendar boundaries, whose lengths vary. Total days, hours, and minutes measure the elapsed timestamp difference.
Does Time only calculate across midnight?: Both times are placed on the current date. If the second time is earlier, the tool shows the absolute same-day difference rather than assuming the next day.