How Many Weeks Between Two Dates?
To find weeks between two dates, calculate the total days and divide by 7. For example, 21 days equals 3 weeks. Use our Date Difference Calculator for instant calculations that show total days, weeks, and weekdays.
Key Takeaways
- Weeks between dates are calculated by dividing the total number of days by 7.
- For pregnancy calculations, weeks are typically counted from the last menstrual period, not conception date.
- Some legal and business contexts define a 'week' as 5 working days rather than 7 calendar days.
Explanation
Weeks between dates are calculated by dividing the total number of days by 7. The result may include a decimal if the days don't divide evenly. For instance, 10 days is approximately 1.43 weeks.
This calculation is useful for pregnancy tracking (counting weeks pregnant), project timelines, rental periods, and subscription billing cycles. Many contexts require knowing both full weeks and remaining days.
Our Date Difference Calculator shows weeks as a decimal for precision, so 2.5 weeks means exactly 17.5 days or 2 weeks and 3-4 days depending on rounding.
Things to Know
- For pregnancy calculations, weeks are typically counted from the last menstrual period, not conception date.
- Some legal and business contexts define a 'week' as 5 working days rather than 7 calendar days.
- Academic weeks may follow specific term calendars that don't align with calendar weeks.