Weeks Between Dates Calculator

Find exactly how many weeks and remaining days between any two dates

Start date

End date

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Enter two dates to see the exact weeks and days between them.

How to use the weeks between dates calculator

This weeks between dates calculator gives you the precise number of full weeks and leftover days between any two calendar dates. Whether you need to know how many weeks between two dates for project milestones, vacation planning, or tracking a countdown, the tool works instantly. It accounts for month lengths and leap years automatically — no manual counting required.

For example, it’s an ideal pregnancy weeks calculator (gestational age), because it shows both the completed weeks and the extra days. You can measure from your last menstrual period or conception date to today. Similarly, use it for event prep, fitness challenges, or any timeline that spans weeks. The result updates as you change dates, so you can experiment with different start and end points.

No data is sent to a server — everything runs right in your browser. The calculation uses the standard difference between two dates: it counts whole 7-day weeks, then shows the remaining days (0–6). Bookmark this page as your go-to weeks calculator for quick, reliable answers.