Date Calculator
Find the exact duration between two dates in days, weeks, months, and years, or use today as a starting point for quick checks. Anniversaries, project timelines, and contract windows all resolve instantly.
How to use the Date Calculator
- Enter the from date and the to date for your range.
- Press calculate to see the full duration breakdown.
- Use the from-today shortcut to skip typing the current date.
- Read the result in the unit that fits your planning.
When the Date Calculator is useful
- Counting days until a deadline, trip, or renewal date.
- Measuring project phase durations for status reports.
- Checking contract or warranty windows precisely.
- Confirming how long ago an event occurred.
How the Date Calculator works
The calculator computes both the continuous day count and the calendar breakdown, because the two answers serve different questions: 90 days versus roughly three months differ at the edges. Month arithmetic respects the varying lengths of calendar months, so February and leap years are handled natively. All computation happens in your browser with nothing transmitted.
Limits to keep in mind
Calendar breakdowns depend on the anchoring convention; check whether your use case needs inclusive or exclusive end dates and interpret accordingly.
Frequently asked questions
Does it count the end date?
Durations show elapsed time between the dates; add one day if your convention counts both endpoints.
How does it handle leap years?
Day counts include February 29 whenever it falls inside the range, automatically.
Can it subtract dates from today?
Yes, the from-today button anchors the start at the current date.
Last reviewed: October 2026.