📆 Days to Weeks
Understand a duration in whole weeks plus fractional or leftover days.
Ideal for vacation planning, project sprints, or habit tracking where weekly cycles matter.
21 days equals
3 weeks
Whole weeks: 3
Remaining days: 0
Years (approx): 0.057495
How to Use This Calculator
Enter days
Provide the total number of days in your plan or dataset.
Read weeks
The calculator divides by 7 to show the number of weeks (including fractional weeks).
Check leftovers
See whole weeks, remaining days, and approximate years to help format your schedule.
Formula
Weeks = Days ÷ 7
Whole weeks = ⌊Weeks⌋
Remaining days = Days − Whole weeks × 7
Years (approx) = Days ÷ 365.25
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Converting days to weeks helps align schedules with weekly cycles such as payroll, sprint planning, and habit tracking. This calculator shows both fractional weeks and a breakdown into whole weeks plus leftover days.
Because not every time span cleanly divides into weeks, the remainder ensures you know how many extra days to account for. The year estimate provides another perspective for longer durations.
For business calendars with 5-day workweeks, you’ll need to adjust the calculation to exclude weekends.
Frequently Asked Questions
Can I convert negative days?
Yes. Negative values represent time offsets in the opposite direction and still divide by seven.
Is the year value exact?
It uses the astronomical average year (365.25 days). For a specific calendar year, divide by 365 or 366 as appropriate.
What about business weeks?
Business weeks often exclude weekends. Multiply business days by 5/7 before using this calculator, or adapt the formula.
Can I format leftovers as hours?
Yes. Multiply the remaining days by 24 to get hours if you need a finer granularity.