Date Duration Calculator
Measure the time between any two dates in seconds.
Choose a start and end date to instantly see the length of the span in days, weeks, months, years, and common workday-friendly units.
Select Dates
Measure the time between any two dates in seconds.
Quick Offsets
Apply a quick offset to the start or end date for common planning scenarios.
Time Between Dates
There are 30 days between 2025-08-29 and 2025-09-28.
Total days
30
Business days (Mon–Fri)
21
Weeks (exact)
4,29
Hours
720
Minutes
43 200
Months (approx)
0,99
Years (approx)
0,082
Common Planning Benchmarks
- 30 days ≈ 1 month
- 90 days ≈ 1 quarter
- 180 days ≈ half a year
- 365 days ≈ 1 year
Frequently Asked Questions
Are leap years handled?
Yes. The calculator counts actual calendar days, so leap days and month lengths are automatically included.
How are business days calculated?
Business day totals include Monday through Friday and skip Saturdays and Sundays. Public holidays are not removed.
Can I measure backwards in time?
Absolutely. If the end date is earlier than the start date the tool swaps them automatically and still returns the positive span.
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