📅 Weeks Between Two Dates Calculator

What is the Weeks Between Dates?

A week is a fixed block of seven days, so working out the weeks between two dates is really a two-step job: first count the total days between them, then divide by seven. The whole-number part of that division is the number of complete weeks, and the remainder is the leftover days that do not quite make another full week. For example, 31 days is 4 weeks and 3 days, because 4 x 7 = 28 and 31 - 28 = 3.

Because the tool parses each date at local midnight and takes the absolute difference, the result is the same no matter which date you type first. It counts the gap between the two calendar days, not the number of calendar weeks that the span touches, so two dates in the same week can still be several days apart. If you need whole calendar weeks (Monday to Sunday) or the ISO week number instead, that is a different question and a different tool.

The total-weeks figure is shown two ways for convenience. The headline result gives you whole weeks and remaining days, which is how people usually think about a countdown ("three weeks and two days to go"). The decimal figure, such as 4.43 weeks, is handy for spreadsheets, pay periods, or anywhere you want a single number you can multiply or compare. Both come from the same total day count, they are just rounded differently.

When to use it

• Counting down the weeks to a wedding, holiday, exam, or due date.
• Working out how many weeks a project, pregnancy, or rental period covers.
• Converting a span of dates into weeks for a timesheet, invoice, or pay period.
• Checking how many weeks of notice, warranty, or subscription time fall between two dates.

How to use the Weeks Between Dates

1. Pick the first date using the date picker.
2. Pick the second date (it can be earlier or later, the order does not matter).
3. Read off the weeks and leftover days, the total weeks, and the total days.
4. Use the today buttons to set either date to the current day, or Clear to start over.

Formula & method

Worked examples

Total days converted to weeks and leftover days

Common mistakes to avoid

• Confusing the day gap with calendar weeks. This tool counts the days between two dates and divides by seven. It does not count how many Monday-to-Sunday calendar weeks the span touches, so two close dates can land in different calendar weeks while still being only a few days apart.
• Expecting an exact whole number every time. Most date spans are not an exact multiple of seven, so you usually get whole weeks plus some leftover days. The decimal figure (such as 4.43 weeks) keeps that fraction instead of hiding it.
• Worrying about which date goes first. The order has no effect. The calculator always uses the absolute difference, so putting the later date in the first box gives exactly the same answer.
• Forgetting whether the end date is included. The result is the gap between the two dates, not a count of days in a range. From a Monday to the next Monday is 7 days (one week), even though that touches two Mondays.

Glossary

Week

A fixed period of seven consecutive days.

Total days

The whole number of days between the two dates, taken as an absolute (positive) value.

Whole weeks

The total days divided by seven and rounded down to the nearest whole number.

Leftover days

The remainder after the whole weeks are removed, a number from 0 to 6.

Decimal weeks

The total days divided by seven, kept as a decimal such as 4.43 rather than split into weeks and days.

Frequently asked questions