Date Difference Calculator
Find exactly how many days separate two dates — for project planning, pregnancy tracking, anniversaries or countdowns to big events.
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How to Use the Date Difference Calculator
- Pick the start date.
- Pick the end date.
- Read the difference in days, weeks and months.
Popular Uses
- Days until a wedding
- Project duration in days
- Days between holidays
- Pregnancy week count
- Subscription days remaining
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Frequently Asked Questions
How are days between dates counted?
The calculator counts full 24-hour days between the two dates, ignoring time of day. The start date itself is not counted; the end date is.
Does it handle leap years?
Yes — it uses real calendar dates, so February 29 and leap years are counted correctly.
Can the end date be before the start date?
Yes. The calculator shows the absolute difference, so order does not matter.
What is the difference between this and the Age Calculator?
The Age Calculator expresses a birth date as years, months and days lived. This tool measures the raw gap between any two dates you choose.