Date Difference Calculator
Calculate the exact difference between two dates in days, weeks, hours, minutes, seconds, and a years/months/days breakdown.
Pick two dates
Difference
518 days
That is 1 years, 5 months, and 2 days.
Weeks
74
Hours
12,432
Minutes
745,920
Seconds
44,755,200
Weekdays (Mon-Fri)
370
Weekend days
148
Frequently Asked Questions about the Date Difference Calculator
How is the difference between two dates calculated?
We compute the absolute number of milliseconds between the two dates, divide by the length of a day, and round to the nearest whole day. Years and months use calendar arithmetic with month-length borrowing.
Does this calculator handle leap years?
Yes. Because we operate on actual calendar dates, any February 29 falling between your start and end dates is automatically counted. The total-days number reflects the true elapsed time.
Why are weekdays and weekend days both shown?
Many use cases (work days, billing periods, project planning) need the split. Weekdays plus weekend days always equal total days, since we use an exclusive end date for the day-of-week scan.
Does daylight saving time affect the day count?
No. The calculator works in date-only mode, so the 23-hour and 25-hour days that occur on DST transitions do not change the result. One calendar day always counts as one day.
Why are years, months, and days shown separately from total days?
Total days is precise. The years-months-days breakdown is how humans describe long spans (3 years, 2 months, 14 days). Both are useful depending on whether you need exactness or readability.