How are full weeks between dates calculated?

The calculator counts total calendar days between the two dates, divides by 7, and shows the whole-number weeks plus remaining days.

What are decimal weeks?

Decimal weeks are total days divided by 7. For example, 15 days is about 2.143 weeks.

Does the calculator include the end date?

By default it does not add the end date as an extra day. Turn on include end date when both boundary dates should count.

Are holidays included in weekday counts?

No. Weekdays are counted by day of week only, so holidays and local calendars are not applied.

Weeks Between Dates Calculator

Calculate full weeks, remaining days, total days and decimal weeks between two dates, with optional inclusive end-date counting.

Start date

End date

Include end date

Full weeks and remaining days

The dominant English intent is interval-based: enter two dates and get the number of complete seven-day blocks plus leftover days.

W_{f u l l} = ⌊ \frac{D _{t o t a l}}{7} ⌋, D_{r es t} = D_{t o t a l} mod 7

D_total is the total calendar-day difference. Decimal weeks are calculated as D_total / 7.

Planning, schedules and calendar hints

Full weeks and leftover days for projects, school terms, trips and personal planning.
Total calendar days and decimal weeks for reports or progress tracking.
Weekday and weekend counts based on Monday through Friday, without holiday calendars.
ISO week labels for the start and end dates as supporting calendar context.

Not medical or legal advice

Pregnancy and deadline hints are calendar references only. Medical dating, contracts and official filing periods can use separate rules.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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