Dates & Time

Weeks Between Dates Calculator

Convert the difference between two dates into full weeks, remaining days, total days and decimal weeks.

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Weeks Between Dates Calculator

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Dates & Deadlines

Calendar-day differences, business-day counting, days-until questions and date arithmetic.

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Calculate weeks and days between dates

Enter two dates to see full weeks, remaining days, total calendar days and decimal weeks. Choose inclusive counting if both endpoint dates should be included.

Full weeks = floor(total days ÷ 7); remaining days = total days mod 7

Example

A 59-day span equals 8 full weeks and 3 days, or about 8.43 weeks.

When to use total weeks vs. full weeks

Use full weeks plus remaining days when you need a calendar-friendly answer. Use decimal weeks when comparing durations mathematically.

Related date calculators

See the same span as days between dates or months between dates. For countdowns, use days until a date.

January 1 to January 29: four full weeks

The elapsed time from January 1 to January 29 is 28 calendar days, or exactly 4 full weeks. Inclusive counting makes that 29 calendar dates: 4 weeks and 1 day.

How to interpret the result

This is a duration in seven-day weeks, not a count of calendar weeks shown on a wall calendar.

Important limitation

For payroll or school periods, confirm whether the period includes the opening and closing date and whether weeks are anchored to specific weekdays.

Continue with: Days Between Dates Calculator · Months Between Dates Calculator

Frequently asked questions

Does one week always equal seven days here?

Yes. Decimal and full-week results use seven calendar days per week.

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Method, assumptions & corrections

See how formulas, sources and limitations are handled across ERICH Calculators.