Whole weeks and leftover days between two dates, for school terms, notice and projects
Runs in your browser. Nothing you type is sent anywhere. Updated on 25 Oct 2026.Weeks between dates are the total days divided by seven, with the remainder left as days. From 15 January 2026 to 4 July 2026 is 170 days: 24 weeks and 2 days, or 24.29 weeks as a decimal. Enter any two dates for whole weeks, leftover days and the exact figure, for school terms, notice and projects.
| From | To | Weeks and days | Total days |
|---|---|---|---|
| 1 January 2026 | 31 March 2026 | 12 weeks 5 days | 89 |
| 1 January 2026 | 30 June 2026 | 25 weeks 5 days | 180 |
| 1 January 2026 | 31 December 2026 | 52 weeks | 364 |
| 15 January 2026 | 4 July 2026 | 24 weeks 2 days | 170 |
| 6 April 2026 | 24 July 2026 | 15 weeks 4 days | 109 |
| 1 September 2026 | 30 June 2027 | 43 weeks 1 day | 302 |
The answer opens in Weeks; set the From date.
Set the To date, such as a due date or the end of a project.
Read the whole weeks and the days left over in the headline.
Check Total days below if you need the exact figure behind the weeks.
The Date Calculator does two jobs. Between two dates gives the gap as total days, as weeks and days, as months and days, and as years, months and days, plus how many of those days are weekdays and how many are Saturdays and Sundays. Add or subtract takes a date and a span in years, months, weeks and days and gives the date it lands on, with its weekday.
How months are counted. A month is a calendar month with the same day number. When the later month is shorter, the date moves to its last day: 31 January plus one month is 28 February, or 29 February in a leap year. The months between two dates are the most whole months that fit by that rule, and the days are what is left, so the answer always adds back to the end date exactly. Under this rule 31 January to 28 February is one month.
Leap years and time zones. The calendar is the Gregorian one, with 29 February every fourth year except century years not divisible by 400 (2000 was a leap year; 2100 will not be). Dates are counted as whole days, so a daylight saving change or your time zone never adds or removes one. Any date from the year 1000 to 9999 works.
The rest of the article, and all 6 questions about Date Calculator, are on the Date Calculator page.
Count the days left in the first month, add every full month in between, then add the day number of the last date. From 15 January to 4 July 2026 that is 16 + 28 + 31 + 30 + 31 + 30 + 4 = 170 days. The calculator does the same count instantly and handles leap years.
Divide the days between the dates by 7. The whole number is the full weeks and the remainder is the extra days: 170 days is 24 weeks and 2 days, or about 24.29 weeks. The calculator shows both forms so a school term, a pregnancy week or a sprint can be read either way.
Add the days month by month. From 15 January 2026, January has 16 days left and February 28, which makes 44; March adds 31 to reach 75; the remaining 15 days land on Wednesday 15 April 2026. Choose Add or subtract, enter 90 days and the date appears with its weekday.
Leap years follow the Gregorian rule: every fourth year, except century years not divisible by 400, so 2000 had 29 February and 2100 will not. Dates are counted as whole days in UTC, so a daylight saving change or a different time zone can never add or remove a day from the answer.
Formula only: no rates or limits are read from an official source.
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