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Free Date Difference Calculator Online
Calculate the exact difference between two dates and times.
Frequently Asked Questions
How do I calculate the number of days between two dates?
Enter the start and end dates above. The calculator shows the total in seconds, minutes, hours, days, and weeks, plus a broken-down summary.
How many days until a future date?
Set the start date to today and the end date to your future date. The result shows exactly how many days, hours, and minutes remain.
Does it count leap years?
Yes. The calculation uses actual calendar milliseconds, so leap years and DST changes are handled accurately.
What if the end date is before the start date?
The calculator shows the absolute difference and notes that the end date is earlier than the start date.