Time and Age Tools
Weeks Calculator
Weeks between dates calculator — count total weeks elapsed between any two calendar dates instantly.
About this tool
The Weeks Calculator counts how many full weeks fall between a start date and an end date — the standard unit for pregnancy gestation, project sprints, payroll cycles, school terms, and fitness programs measured in weekly blocks.
Select your start and end dates, click Calculate, and view the total week count based on real calendar days. Leap years and month-length variations are handled automatically.
For day-level precision instead of weeks, use the days between dates calculator. To convert a birth date into total weeks lived, the age in weeks and months tool is the better fit.
Convert Days to Weeks
Convert Weeks to Days
Weeks Between Two Dates
How to Use This Tool
- Pick start and end dates.
- Click calculate.
- View weeks result.
Frequently Asked Questions
What does the Weeks Calculator do?
It calculates the number of weeks between two selected dates, helping you understand a date range in weekly terms.
Does it handle leap years and different month lengths?
Yes. The calculation is based on real calendar dates, so leap years and varying month lengths are included automatically.
Can I use it for pregnancy or baby week tracking?
Yes. Many people track progress in weeks, and this tool makes it easy to calculate how many weeks have passed between two dates.
Does the result include both start and end dates?
Most week calculators count the time elapsed between the two dates. If you need inclusive counting, you can adjust by adding a day depending on your use case.
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