Calculate the exact time duration between two dates and times. Enter start and end datetime to get the difference in years, days, hours, minutes, and seconds. This free time duration calculator is perfect for project tracking, work hours, and elapsed time measurement.
Use the datetime pickers to select your start and end dates and times. You can type directly or use the calendar widget to pick a date.
Quickly select common time ranges using the Today, Last 7 Days, Last 30 Days, or Last 1 Year preset buttons to avoid manual entry.
Press the Calculate Duration button to see the exact difference displayed in years, days, hours, minutes, seconds, and total hours, minutes, and seconds.
Q: Can I calculate duration across months with different lengths?
A: Yes, the calculator uses exact calendar dates, so it correctly accounts for months with different numbers of days and leap years.
Q: What if my end time is before my start time?
A: The calculator will still show the duration but indicates 'end before start' so you know the time range is inverted.
Q: Can I calculate duration in just hours or just minutes?
A: Yes, the results section shows total hours, total minutes, and total seconds in addition to the year/day/hour/minute/second breakdown.