To calculate how many weeks are between two dates, follow these general steps:
- Calculate the total number of days between the start date and the end date.
- Divide the total number of days by 7, because there are 7 days in a week.
- The result can include a decimal if you want to see partial weeks. If you need whole weeks only, round down to the nearest integer.
For example, if there are 108 days between two dates:
- Divide 108 by 7 = 15.42857 weeks
- This means 15 whole weeks and about 3 days (0.42857 × 7 = 3 days)
You can calculate this manually using a calendar, or use spreadsheet formulas like DAYS(end_date, start_date)/7 in Excel or Google Sheets. This method also accounts properly for leap years and varying month lengths if you calculate days correctly before dividing by 7.