Weeks between two dates
Some spans are easier to think about in weeks — pregnancies, training plans, project sprints, rental terms. Enter two dates and get the span as whole weeks plus remaining days.
For the full breakdown — months, weekdays, hours — use the days between dates calculator.
Worked example
Sunday, 11 October 2026 to Friday, 25 December 2026 is 75 days, which divides into 10 whole weeks and 5 extra days (10 × 7 = 70, plus 5). The "decimal weeks" figure (10.71) is the same span expressed as a fraction — useful in spreadsheets, less useful in conversation, which is why the weeks-plus-days form leads.
Note the difference between "weeks between dates" and calendar weeks: this tool counts rolling 7-day periods from your start date. If you instead need the ISO week number a single date falls in, the weekday finder shows it.