Weeks Calculator

The Weeks Calculator helps you figure out how many weeks are between two dates. You can also show the total days and hours if you want.

Options
Include partial weeks
Show total days
Show total hours

How to Use:

The tool supports three modes:

  • Weeks Between: Select a Start Date and an End Date to calculate the total weeks between them. The End Date must be after or equal to the Start Date. The tool will display the difference in weeks, days, and hours, depending on your selected options.
  • Add Weeks: Enter a Start Date and the number of weeks to add. The tool will calculate and show the new End Date, along with the time difference in days, hours, and weeks. The End Date input field is hidden in this mode it’s shown in the output only.
  • Subtract Weeks: Similar to Add Weeks, but subtracts weeks from the Start Date. Enter the number of weeks to subtract, and the tool will calculate the earlier date and display the result. End Date is again output-only.

Options:

  • Include partial weeks: Toggle this on to show fractional week values (e.g., 3.57 weeks). If off, you’ll only see whole weeks.
  • Show total days: Displays the total number of days between the two dates.
  • Show total hours: Converts the day difference into hours for a finer-grained result.

Use the “Clear All” button to reset everything to default (today’s date and 0 weeks), or export/copy your results using the respective buttons.thing. But there’s also a Calculate button if you want to click it manually. You can copy the result, export it to a .txt file, or reset everything using the buttons at the bottom.

What Weeks Calculator can do:

The Weeks Calculator gives you a simple way to calculate the duration between two calendar dates in weeks. If you want just full weeks, disable partials. But if you want to see even the fractions, it’s got you covered.

Want more detail? You can show the same span in total days or convert those into hours with a single switch. It’s flexible whether you’re measuring project timelines, pregnancy weeks, subscription cycles anything involving dates.

Example:

Mode: Add Weeks
Start Date: 2025-01-01
Weeks to Add: 20

Output:

Total weeks (including partial): 20.00
Total days: 140
Total hours: 3360

Weeks Calculator Table:

The Weeks in a Month Calculator Table shows you how each month breaks down by full weeks and calendar week spans. It updates automatically based on your system’s current date, listing the current month and the 11 months ahead. For each one, you’ll see the start day, total number of days, number of complete 7-day weeks, and how many calendar weeks the month covers. This is useful for planning schedules, understanding monthly layouts, or checking how weeks align across months and years especially when you need to know if a month has 4 or 5 full weeks.

MonthYearStarts OnTotal DaysFull WeeksCalendar Weeks Spanned

Common Use Cases:

Whether you’re planning a project deadline, tracking how long you’ve been at a job, or just trying to count down to a vacation, the Weeks Calculator makes it easy. You can calculate time between two dates, jump forward or back by a set number of weeks, and break everything down into the details weeks, days, and even hours all without touching a calendar.

Useful Tools & Suggestions:

If you’re working in weekly units, the Days Calculator helps when you need tighter control or want to include weekends. And if you’re comparing two dates across weeks, the Date Duration Calculator gives you the full breakdown weeks, days, and everything in between.

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