Date & Time
Days Between Dates Calculator
Calculate the number of days between two dates. Perfect for tracking anniversaries, project timelines, and age in days.
Days Between
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How It Works
The calculator computes the difference in milliseconds between two dates and converts it to days by dividing by the number of milliseconds in a day (86,400,000).
Example
From January 1, 2024 to December 31, 2024 is 365 days.
Frequently Asked Questions
Does the calculation include both the start and end dates?
No, the result shows the number of complete days between the two dates. If you need to include both dates, add 1 to the result.
Can I calculate days in the past?
Yes, simply enter an end date that is before the start date. You'll get a negative number, which you can interpret as days ago.
What about leap years?
The calculator automatically accounts for leap years, so your result is always accurate.